Dynacord DMM 4650 User manual

OWNER’S MANUAL
DMM 4650 DJGITAL MESSAGE MANAGER
Description
TheDMM4650isasignaiprocessorwhichallowsforanuniversaigenerationandcontrolofaudio-signals. Itsmain
purpose is the installation in electro-acoustic rack systems, but stand-alone applications are possible as
well. The audio signals can consist of alarm, gong, voice messages but also of random combinations of
these sources. The programs were created by Dynacord (preset). Anyway, it is possible for the user
(consulting company, etc.) to modify those programs and store them as user-programs. The audio input
canbemixedwiththeDMM 4650internallygeneratedaudio signals(e.g.gongsignals withannouncements),
or given out as priority at the audiooutput (programmable).
The audio quality of the messages can be selected, depending on memory extension and different user
requirements. Withmaximum memory extension,atotalrecordingtime of 16 minutesispossible. Password
protectionfor various operationlevels is provided. For”EASY-USER”,the provided operation features are
similar to those known from cassette recorders or CD players. The control of the programs is performed
via floating inputs and floating outputs provide status messages. The priorities and functions of these
lines can be programmed individually (Setup). A computer interface facilitates saving and loading of the
unit’s configuration and its message data.
In order to ensure functional reliability, self-surveiliance and audio data verification are employed. The
alarm is ignited via internal fault-output while all warnings are logged. The DMM 4650 is maintenance-
free since no serviceable parts, batteries or accumulators are to be found inside the appliance.

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CONTENTS
INSTALLATION INSTRUCTIONS ..................................................5
FRONT PANEL ..............................................................................6
REAR PANEL.................................................................................7
USE OF THE DMM 4650 ...............................................................8
Audio functions.......................................................................8
Control functions ....................................................................8
Sequence functions................................................................9
OPERATION OF THE DMM 4650 .................................................10
General..................................................................................10
Stand-by mode ......................................................................10
Password, user password .....................................................10
Password, entry, operation end.............................................10
Priority function......................................................................10
Menu structure ......................................................................11
Operation menu diagram.......................................................11
MESSAGE......................................................................................12
General..................................................................................12
Message number, preset.......................................................12
Operation menu message .....................................................12
Soft key ”edt ..........................................................................13
Title...................................................................................13
Priority ..............................................................................13
Play all..............................................................................13
Release ............................................................................13
Free space .......................................................................13
lnfo ...................................................................................13
Checksum ........................................................................13
Delete...............................................................................13
Level adjustment, record level...............................................14
Remote recording..................................................................14
Audio quality, recording time .................................................14
Message memory extension .................................................14
Asterisk (*) after displayed running time................................14
GONG.............................................................................................15
General..................................................................................15
Gong presets.........................................................................15
Operation menu gong............................................................15
Load .................................................................................15
Edit ...................................................................................15
Title...................................................................................15
Priority ..............................................................................15
Save .................................................................................15
List of available gong parameters.......................................16
ALARM...........................................................................................17
General ...............................................................................17
Alarm presets......................................................................17
Operation menu alarm ........................................................17
Load .................................................................................17
Edit ...................................................................................17
Title...................................................................................17
Priority ..............................................................................17
Save .................................................................................17
List of available alarm parameters......................................18
ANNOUNCEMENT..........................................................................20
General ................................................................................20
Operation menu announcement………………...............…...20

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TRIGGER…………………………………………….................……21
General................................................................................ 21
Operation menu trigger ....................................................... 21
Trigger detection ................................................................. 22
Examples trigger adjustments ............................................. 22
SEQUENCE .................................................................................23
General................................................................................ 23
Sequence Presets ............................................................... 23
Operation menu sequence .................................................. 23
Load ............................................................................... 23
Priority ............................................................................ 23
Stop trigger..................................................................... 23
Step list .......................................................................... 23
Title................................................................................. 24
Save ............................................................................... 24
Sequence example.............................................................. 24
List of available step functions in a sequence .................. 25
SETTINGS....................................................................................26
General................................................................................ 26
Operation menu settings ..................................................... 26
Contrast.......................................................................... 26
Backlight......................................................................... 26
Headphones................................................................... 26
Priority ............................................................................ 26
Password ....................................................................... 26
Outputs........................................................................... 26
Bypass ........................................................................... 26
Sum gain ........................................................................ 27
lnit DMM 4650 ................................................................ 27
Format Flash .................................................................. 27
Flash space.................................................................... 27
Software ......................................................................... 27
Language ....................................................................... 27
Backup ........................................................................... 27
Restore........................................................................... 28
RS 232 ........................................................................... 28
Clock .............................................................................. 28
SELF-TEST................................................................................. 29
General ............................................................................. 29
Operation menu self-test .................................................. 29
CONNECTIONS.......................................................................... 30
Control inputs and control outputs Port A - D.................... 30
General .......................................................................... 30
Control levels and currents ............................................... 30
Inputs ............................................................................. 30
Outputs........................................................................... 31
Installation example .......................................................... 31
Inputs ............................................................................. 31
Outputs........................................................................... 31
Audio inputs and outputs................................................ 32
Remote, RS 232 connection, data backup ....................... 33
General .......................................................................... 33
Connection REMOTE/RS 232........................................ 33
Interface settings............................................................ 33
Backup, Restore commands, priority ............................. 33
List of REMOTE commands........................................... 34
Terminal programs ......................................................... 34

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FACTORY PRESETS......................................................................36
Factory presets, defaults.......................................................36
List of trigger signals........................................................... 36
List of factory preset sequences............................................37
List of factory preset gong signals.........................................45
List of factory preset alarm signals........................................47
Troubleshooting........................................................................47
FAQ’S, hints.............................................................................48
Examples for alarm texts....................................................... 50
Block diagram........................................................................ 51
Dimensions............................................................................52
Specifications...........................................................................53
Warranty ................................................................................ 54

5
IMPORTANT SAFETY INSTRUCTIONS
The lightning flash with arrowhead
symbol, within an equilateral triangle
is intended to alert theproduct’s
enclosure that may be of sufficient
magnitude toconstitute a risk of
electric shock to persons.
The operating and maintance
(servicing) instructions in the litera-
ture accompanying the appliance.
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a damp cloth.
7. Do not block any of the ventilation openings
Install in accordance with the manufactures instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus that
produce heat.
9. Only use attachments/accessories specified by the manufacturer.
10. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been
damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have
fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or
has been dropped.
For US and CANADA only:
Do not defeat the safety purpose of the grounding-type plug. Agrounding type plug has two blades and a third
grounding prong. The wide blade or the third prong are provided for your safety. When the provided plug does
not fit into your outlet, consult an electrican for replacement of the absolete outlet.
IMPORTANT SERVICE INSTRUCTIONS
CAUTION:These servicing instructions are for use by qualified personnel only. To reduce the risk of
electric shock, do not perform any servicing other than that contained in the Operating
Instructions unless you are qualified to do so. Refer all servicing to qualified service
personnel.
1. Security regulations as stated in the EN 60065 (VDE 0860 / IEC 65) and the CSA E65 - 94 have to be obeyed
when s
ervicing the appliance.
2. Use of a mains separator transformer is mandatory during maintenance while the appliance is opened, needs
to be operated and is connected to the mains
3. Switch off the power before retrofitting any extensions, changing the mains voltage or the output voltage.
4. The minimum distance between parts carrying mains voltage and any accessible metal piece (metal
enclosure), respectively between the mains poles has to be 3 mm and needs to be minded at all times.
The minimum distance between parts carrying mains voltage and any switches or breakers that are not
connected to the mains (secondary parts) has to be 6 mm and needs to be minded at all times.
5. Replacing special components that are marked in the circuit diagram using the security symbol (Note) is only
permissible when using original parts.
6. Altering the circuitry without prior consent or advice is not legitimate.
7. Any work security regulations that are applicable at the location where the appliance is being serviced have to
be strictly obeyed. This applies also to any regulations about the work place itself.
8. A l l instructions concerning the handling of @ - circuits have to be observed.
Note: SAFETY COMPONENT (HAS TO BE REPLACED WITH ORIGINAL PART ONLY)

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FRONT PANEL
1. INPUT MIC
XLR-socket for the connection of a microphone when
recording a message. By using a short test-sample,
the level is automatically adjusted and the setting is
saved.
Thisinput can also be usedfor making announcements.
2. INPUT LINE
RCA-type sockets for the connection of stereo or
monaural audio signal sources (tape deck, CD player)
when recording a message. A wired in parallel OdBu
socket on the rear panel is also provided. By using a
shorttest-sample,the level is automaticallyadjustedand
the setting is saved.
Thisinput can also be usedfor making announcements.
3. PHONES
Stereo phone jack 1/4" (6.3 mm) to pre-listen to
messages, gong and alarm signals via headphones.
Wired in parallel, a OdBu socket is provided on the rear
panel.
4. Multi-function Display
Back-lit LC display, 2 lines with 16 characters, each.
The display lights up by pressing any key.
ThedisplayisdimmedwhenevertheEXIT-key gets pres-
sed or no key is pressed for at all within a short while.
5. SOFT KEY
Dependingontheselectedoperationmode,the soft keys
are used in various ways. The according function is
indicated on the display.
6. CURSOR
CURSOR-keys to control the cursor on the display and
for modifying data.
7. RECORDER
Keys for ...
TITLE skip back, REWIND, PLAY/STOP, REC, FAST
FORWARD, TITLE skip forward.
8. EXIT
Key for exiting the edit mode in order to prevent
unauthorizedoperation. Eachpressingofthekeyswitches
back one menu stage.
9. POWER
TheLED lightswhenever theDMM 4650is readyfor ope-
ration. In case the LED BLINKS you should contact a
DYNACORD service center.

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10. 24 V DC power supply
2flat-pinplugs 114" (6.3 mm) forconnectionto emergency
power supply (battery) or other external power sources.
Please mind the correct polarity (+-).
1 1. REMOTE
The 9-pole D-SUB connector ”Remote-Control RS-232”
is a serial computer interface for data transfer and ser-
vice functions.
PORT A-D
All inputs and outputs are provided in 2-poie floating de-
sign and isolated from the DMM 4650 circuitry and
adjacent lines.
Each input is realized as anAC opto-coupler (AC floating
polarity).
Each output has a floating relay contact.
Each port connector (DB 25) has 4 inputs, 4 outputs, and
per port +24 V line and ground potential conductors.
Bymeans ofthe 24V DCvoltage, it is possible to connect
external floating control keys as well as contacts directly.
All inputs and outputs and their corresponding functions
can be freely assigned or a factory preset can be recalled
instead.
REAR PANEL
12. PORT A
4 control inputs and 4 trigger outputs
1 fault output (alarm on defect of the appliance)
1±24V DC, 90 mA power source
13. PORT B
Control inputs, trigger outputs and ±24 V DC
14. PORT C
Control inputs, trigger outputs and ±24 V DC
. optionally retrofitted
15. PORT D
Control inputs, trigger outputs and ±24 V DC
. optionally retrofitted
16. PRE-OUT
RCA-type socket, pre-listen
17. REC-INP
RCA-type socket, recording, announcement
18.OUTPUT
3-pole XLR-type connector (audio output) electronically
balanced (transformer can be retrofitted).
19. INPUT
3-pole XLR-type connector (audio input) electronically
balanced (transformer can be retrofitted).

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Use of the DMM 4650
The DMM 4650 can be used in both, incorporated in a rack shelf system or as stand-alone unit. The installer should
automate the daily sequences by external control keys, sensors, contacts and the corresponding unit settings. This
applies for gongs, alarms, messages and their combinations, as well as for recordings of variable announcements.
Thiscontributesto a considerableadvantagein the easeofuse since manuallyoperating the applianceisnot necessary
anymore.
Often used functions of the DMM 4650 are directly implemented as factory presets and can be utilized without any
additional programming effort. By editing the default values and storing them into a user preset a customer-optimized
configuration is quickly developed.
Audio function
The audio signals of the electro-acoustic sound reinforcement system are looped via INPUT and OUTPUT to the
power amplifier. The SUM control can be programmed for this stand-by position. In case of failure a stand-by relay
takes over the connection. When starting a sequence via control line, the desired audio signal gets generated (DMM
SIGNAL) and fed to the OUTPUT via the programmable DMM-control. The controls (DMM, SUM) defined within the
sequence determine, whether the two audio signals are merged or the one gains priority over the other.
The MIC, LINE input is used for recording a message and can also be used for announcement purposes. The
headphones outputs PRE-LISTEN and PRE-OUT are for monitoring the DMM signals without actually starting a
transmission.
Control function
A maximum of 16 floating inputs are provided for integration into a sound reinforcement installation. Their use and
polarity can be freely programmed. A maximum of 16 floating relay contacts are provided to be used as control
outputs. The inputs and outputs are divided into 4 Ports (A, B, C, D,); where Port A also contains a fault contact.

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Each of the 4 ports also supplies a power source in order to facilitate the connection of floating contacts. The ground
andearthing conditionsare shown in the above diagram. The strictseparation ofcontrol andaudio signalsguarantees
the trouble-free installation.
Sequence function
The following example shows in sequence the necessary steps from closing the contact of an external switch to
listening to the audio signal:
A switch is connected to one of the DMM 4650’s control inputs (Al - D4). The desired input is selected in the trigger
menu. Logic level (high, low), delay, and function (dyn, stc, latch) can be set. The desired sequence (Sxx) gets
chosen here as well.
For this sequence, the actions of the DMM 4650 are programmed step by step. Standard sequences are provided as
factory presets. They can be modified as need arises and stored as user presets.
Example of a sequence: set output (lamp indicator), audio control SUM off, audio control DMM -3 dB, wait for input
release, after release start alarm, delay 10 sec. (alarm duration), end.
This sequence is entered line-by-line with special commands (list page 25) and - including name and
priority - stored as a preset. If an appliance uses unaltered functions on a regular basis, it is also possible to save
these sequences via the RS 232 interface.

10
OPERATING THE DMM 4650
General
All adjustments carried out at the appliance remain in memory even if the appliance is not connected to a
power source (EPROM).
Pressing the EXIT-key lets you step back and forth through the levels of the operation menu tree (page 1 1).
The stand-by mode is entered by pressing the EXIT-key when in the ”main menu” ’
If no key is pressed within a period longer than 5 minutes, the appliance enters the stand-by mode automatically
(except during recording and restore).
Stand-by
When the DMM 4650 is connected to a power source, the green POWER-LED lights, the display is dimmed,
and the relay outputs are set to their preprogrammed states according to the system’s configuration. This
stand-by status is remained until a control input starts a sequence. The display shows the sequence’s name
and number for the duration of the sequence. After completion of the sequence, the DMM 4650 re-enters
stand-by mode.
The states of the control ”outputs”, the audio relay ”bypass”, and the ”sum level” setting during stand-by
operation are set in the operation menu ”System setup” (page 26).
Password
Password-protection prevents the DMM 4650 from unauthorized operation. Three distinct user levels are available
which can be accessed by entering the respective password. As factory defaults, ”l 1 1 1 ” is programmed for Level 1
(easy operation), ”2222” for Level 2 and ”3333” for Level 3 (installer). Individual modification for each user is possible.
The menu tree diagram (page 1 1) shows which access is assigned to the respective user level.
Password entry, operation end
Pressing any key on the DMM 4650’s front panel, ”Password ?” appears on the display. Using the cursor keys you
have to enter a 4-digit number and confirm it with the menu key ok. After entering the correct 4-digit password, the
display shows the number of your user level. Using the cursor keys you are able to select the desired menu. The
EXIT-key cancels the operation and the appliance is protected against unauthorized use.
Priority function
With the DMM 4650 provides the opportunity to set priorities from 0 to 99; where 99 represents the highest priority
level. Setting the priority level leads in different results.
The priority of a sequence is defined by its free programmable priority setting (menu ”sequence” ”priority”). This
determines, whether e.g. a fire alarm sequence cancels a gong control sequence. Not the control line of an input, but
thepriority number of the triggered sequence determines its priority. With equal priorities, thesequence that had been
started first remains valid.
The selected user level states the priority for the operation on the appliance. User level 1 = priority no. 33, user level
2 = priority no. 66, and user level 3 = priority no. 99. Modifying the default for lower user levels is performed within the
menu ”System setup” ”priority”’. The setting of the user priority controls, whether an operator gets interrupted by an
important sequences (sequence priority).
Users are able to modify messages, gongs, and alarms and save them as user presets. Depending on the actual user
level, the programs are automatically provided with the corresponding user priority numbers (see above). They are
maintained for the case that the original preset’s priority is lower. In this way it is guaranteed that user 1 cannot modify
the presets of user 2. In order to allow access for other users, the priority allocation can be modified downwards (lower
priority) by the respective user before storing a preset
(menu: ”message > priority”, gong” > ”priority”, ”alarm” > ’priority”)
If recording a message via remote recording, the priority number of the recording sequence is transferred to the
message.

11

12
Message number, Preset
Up to 1 00 distinct messages (MOO to M99) including title, name, and priority can be saved.
The DMM 4650 is shipped without any prerecorded messages, since - depending on individual user requirements and custom
applications-variations wouldbenumerous. Somefactorypreset sequencesuseMOO, M01,andM02 (seelistof presetsequences).
Thus, they have to be recorded for incorporating them in the respective applications. Some text examples are to be found at the
end of this manual.
Operation menu ”message”
Confirming the menu selection ”message” by using the soft key ”ok”, the number of the message appears in the
display together with its title and playback time (hours : minutes . seconds). The DMM 4650 is now
in therecording/playback mode and can be operated using the transport-keys as follows:
Note: This mode only allows playback via the PRE-listen/Phone outputs!
Title skip backwards, selects the previous actually recorded message. During playback
the selected message starts playing immediately.
Rewind, skips back one message, during playback fast rewind enables the user to listen
to a specific part several times.
Play/Stop starts or stops the playback of the selected message. Recording is stopped by
pressing the stop key.
Recording, pressing this key once switches the selected message into recording stand-by.
In case a previously recorded message exists, the question ”delete?” is displayed and
leaving you the choice to record a new message with ”Y=Yes” or cancel the command
with ”N=No”. If you choose delete, the record key has to be pressed again after completion
of the procedure. If this message is not supposed to be deleted, you have to select an empty
location. The items ”Recording type ”and ”Recording /evel”are explained later. The display
now shows ”record Mxx’and ”pause” with a bargraph, indicating the current signal level.
Pressing the record key again starts the recording and ’Play time” replaces ’Pause”.
Pressing the Stop/Play-key terminates the recording.
Fast forward, skips to the next message, forwarding during playback enables the user to listen to
parts of a longer message.
Title skip forward, selects the next actually recorded message, during playback this next message is
immediately audible.
Using the cursor keys lets you select the previous or next message number.
Soft key ”vl” accesses the volume setting dialog for the phone and pre-listen outputs using the cursor
keys.
Soft key ”edt” accesses the menu level for title editing, etc. (see following paragraph).
MESSAGE

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Soft key ”edt”
Using the ”edt”key in playback mode provides the opportunity to edit and manage your message structure. The keys
are used to select the following menu items.
Title
Confirming ”Title” with the soft key ”ok” the selected message’s current name appears on the display. Using the
cursor keys lets you enter a name which can consist of up to 8 characters. The soft keys ”A-a” are used to toggle
between between the upper and the lower letter case while ”spc” inserts a blank. After pressing ”EXIT’ (one menu
level down) the question ”store y, n” appears, in order to prevent any inadvertent alteration of the name.
Priority
Confirming ”Priority” with the soft key ”ok”, the priority number of the selected message appears on the display and,
by using the cursor keys, providing the user with the possibility to alter the number from 00 up to the his/her priority
level. A higher priority prevents unauthorized alteration of this preset by users with lower priority. After pressing
”EXIT” (one menu level down) you have to choose on the appearance of the question ”store y, n”, whether you want
to make your changes permanent.
Play all
Confirming ”Play all” with the soft key ”ok”, the name of the first message gets displayed. Using the PLAY/STOP-key
lets you start or stop the playback of all recorded messages. Mostly, this menu item serves for transferring all
recorded messages onto an analog audio tape deck or DAT recorder via the phone/pre-listen outputs.
Release
Confirming ”Release’with the soft key ”ok”, the display shows that the search for lost blocks in the flash memory
(sound memory) has been engaged. Whenever such blocks are found, the memory structure gets repaired which is
also indicated on the display. This menu’s operation is used to release memory that has been mistakenly reserved.
Free space
Confirming ”Free space ”with the soft key ”ok”, the number of available flash memory chips and the overall free sound
memory capacity are displayed in
lnfo
Confirming ”Info’ with the soft key ”ok”, shows the audio quality setting and the used space for the previously selected
message.
Confirm
The audio data of a message is constantly monitored. In case an inaccurate data structure (see also self-surveillance
page 29) is detected, the corresponding message is marked with an asterisk (*). Anyway, if the erroneous data does
not affect the audible result of the sound reproduction, ”confirming” with the soft key ”ok” omits the marking (*). From
now on, the actual data is utilized as test pattern and you are given the possibility to acknowledge the fault indication
(Power-LED blinks) within the menu ”self-test” (page 29).
Check sum
Confirming ”Checksum”with the soft key ”ok”, the checksum of the previously selected message appears on the
display. In case of fault, this value is used as a reference for erroneous messages.
Delete
Confirming ”delete”with the soft key ”ok”, shows the question ”delete?”on the display. Using the soft keys ”y=yes,
n=no” lets you erase the previously selected message.

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Recording level
An integrated, electronic control automatically adjusts the input sensitivity of the DMM 4650’s (Mic, Line, Rec. lnp)
inputs. This level setting remains unchanged, until the question ”Select new recording level?” is answered by using
the soft key ’)/=yes”before starting a new recording. By using a short test signal marks the new setting of the control
which is automatically stored. Pressing the soft key ”ok” exits the recording level menu.
Adjusting the recording level only becomes necessary when the connected signal source is changed or major level
changes occur.
Remote recording
it is possible to activate a recording via one of the control inputs (ports A.. D). An example given in the list of factory
sequences (S29, S30) on the pages 40-41. The message defined within the sequence is automatically erased before
the new recording starts. The example employs an indication lamp for start recording (= deleting end) and the maxi-
mum recording time is set to 10 seconds.
Adjusting the recording level corresponds to the description in the previous paragraph. The message’s audio quality
setting stays unaltered as well. The priority number of the sequence gets copied to the priority of the message.
Audio quality, recording duration
Prior to recording a message, ”recording type” is shown on the display. The cursor keys are used to alter the audio
cutoff frequency (1 6 kHz, 8 kHz, 4 kHz) and the signal quality (CD = 16 bit linear, long = 8 bit, p-Law). The factory
defaultsetting is ”8 kHz long” for allmessages. The newly set audio quality is maintainedand individual adjustment for
each message is possible.
Table for recording time (minutes) versus audio quality and installed sound memory extension (NR 90205).
Accuracy CD long*
bandwidth 4 kHz 8 kHz 16 kHz 4 kHz 8 kHz 16 kHz
without NR 90205 2 min 1 min 0,5 min 4 min 2 min 1 min
1 x NR 90205 4 min 2 min 1 min 8 min 4 min 2 min
2x NR 90205 6 min 3 min 1,5 min 12 min 6 min 3 min
3x NR 90205 8 min 4 min 2 min 16 min 8 min 4 min
*The specified times for the”long” recording mode are minimum values since the active data reduction recognizes
pauses in the audio signal. Pauses are defined as passages where the signal level drops -70 dBu below full modu-
lation.
Message memory extension
It is possible to extend the sound memory capacity of the appliance by incorporating up to three additional plug-in
boards (extension kit NR 90205). The corresponding recording times are specified in the table above. The flash
memories have to be formatted after insertion (see menu ”system setup”> ”format flash’).
Asterisk (*) behind message duration
An asterisk * behind the message recording time display signals that the corresponding data has been corupted. The
error is shown by the blinking Power-LED. In case you decide that the audio quality is sufficient, after listening to the
recording, you have to enter the menu ”confirming” (page 13) to delete the -sign. If the result is not tolerable, the only
solution is re-recording the message. To omit the blinking Power-LED you have to acknowledge error no. 14 in the
’self-test” menu (page 29).

15
GONG
General:
GongPresets areaudio signalsthat canbe startedwithin a sequence. Order and parameters of a gong sequence can
be edited. For test purposes the sound can be started in the ”gong > editor” menu by use of the PLAY/STOP keys. it
is audible via the Pre-Listen outputs.
Gong Presets
20 freely programmable presets (user preset) are available; from GOO - G19. Starting with G20 and going to G26
factory preset gong sequences are programmed. The corresponding functions are explained in the table on page 45.
Erasing the factory presets is not possible. Creating your own gong sequence is easiest accomplished by modifying
an existing, possibly similar gong (user or factory preset) and storing it under a new number together with its new title
and priority.
Operation menu gong
Confirming the menu selection ”gong” with the soft key ”ok”, the cursor keys < > allow selecting the following sub
menus.
Load
Confirming ”load” with the soft key ”ok”, ”Gxx ’Title ’and the soft keys ’yes, no” appear on the display. Using the cursor
keys the gong number xx is modified while the corresponding name is being displayed. ”y” lets you load the selected
gong into memory and modification is performed in the ”editor” menu.
Editor
The ”editor” menu allows modification of gong sequences, envelopes, repetition amounts and several other para-
meters (see parameter listing). Testing the gong’s sound properties is possible by starling the gong sequence, using
the PLAY/STOP key. The audio signal is presented at the pre-listen outputs. Parameter modifications are audible
after performing a restart. Pressing the RECORD key stops the gong. After pressing the ”EXIT”key (previous menu
level), the question ’store yes, no?”appears on the display. Acknowledging this question lets you save your new
settings in a user preset.
Title
Confirming ”Title”with the soft key ”ok”, the name of the currently loaded gong sequence appears on the display.
Using the cursor keys you are able to enter a new name that consists of up to 8 characters. The soft keys ”A-a” are
used to shift between the upper and the lower character case while ”spc” inserts a blank character. After pressing the
”EXIT”key (previous menu level), the question ”storeyes, no?”appears on the display. Acknowledging this question
lets you save your new settings in a user preset.
Priority
Confirming ”Priority”with the soft key ”ok”, the priority number of the selected gong preset gets displayed. Using the
cursor keys, the priority number can be set starting from 00 up to the user priority. A higher priority protects against
unauthorized alteration of this preset by users with lower priority level. All factory presets are provided with a priority
of 00, because they cannot be overwritten, anyway. This offers any user the possibility to use them as prototype
sequences.
Afterpressingthe”EXIT’key(one menu leveldown),thequestion’storeyes,no?”appearsonthe display. Acknowledging
this question lets you save your new settings in a user preset.
Save
Confirming ”save” with the soft key ”ok”, the currently selected gong number gets displayed. Using the cursor keys,
the desired gong number can be entered. Storing a preset has to be confirmed with the soft key ”y =yes”. With
”save’all modifications in the above mentioned menu items are saved into the selected user preset. Thus, individually
saving the parameters is not necessary, since they remain in memory until another gong is being loaded.

16
List of available gong parameters
Type four-stroke, three-stroke
barl: first gong stroke, A highest sound, B, C, to D deepest sound
atlackl: attack rate from 00ms (hard) to 99ms (soft)
releasel: fading sound from XXL (long, several seconds.), XL, L, M, S, XS, XXS (short, approx. 1 sec)
start 2: start delay of the second gong stroke in seconds. (min 00.0s, max 99.9s)
bar2: second gong stroke, A highest sound, B, C, to D deepest sound
attack2: attack rate from 00ms (hard) to 99ms (soft)
release2: fading sound from XXL (long, several seconds.), XL, L, M, S, XS, XXS (short, approx. l sec)
start 3: start delay between second and third gong stroke in seconds. (min 00.0s, max 99.9s)
bar3: third gong stroke, A highest sound, B, C, to D deepest sound
attack3: attack rate from 00ms (hard) to 99ms (soft)
release3: fading sound from XXL (long, several seconds.), XL, L, M, S, XS, XXS (short, approx. 1 sec)
start 4: start delay between third and fourth gong stroke in seconds. (min 00.0s, max 99.9s)
bar4: fourth gong stroke, A highest sound, B, C, to D deepest sound
attack4: attack rate from 00ms (hard) to 99ms (soft)
release4: fading sound from XXL (long, several seconds.), XL, L, M, S, XS, XXS (short, approx. 1 sec)
Type two-stroke, one-stroke
barl: first gong stroke, A highest sound, B, C, to D deepest sound
attackl: attack rate from 00ms (hard) to 99ms (soft)
releasel: fading sound from XXL (long, several seconds.), XL, L, M, S, XS, XXS (short, approx. l sec)
start 2: start delay of the second gong stroke in seconds. (min 00.0s, max 99.9s)
bar2: second gong stroke, A highest sound, B, C, to D deepest sound
attack2: attack rate from 00ms (hard) to 99ms (soft)
release2: fading sound from XXL (long, several seconds.), XL, L, M, S, XS, XXS (short, approx. 1 sec)
repetition: number of repetitions of the gong sequence (min 1 x, max 9999x), 0000 corresponds to infinite repeti-
tion.
rep-del: time between two gong sequences in seconds (min 00.1s, max 99.9s).
Remarks regarding parameter setting:
Although the above mentioned parameters are extensively variable, the gained results not always represent a good
sound. E. g.: attacks for low frequency bar strokes are acoustically quite different from the gongA sound.
Since a maximum of 2 gong strokes can be simultaneously processed, starting the third gong too early will abruptly
end the first one and lead to unpleasant sound cut-off knacks. Effects like these resulting from extreme parameter
settings are of physical reason and should be optimized by listening tests, first.

17
ALARM
General:
Alarms are audio signals that can be started within a sequence. The alarms are square wave forms providing the
possibility for various parameters to be adjusted. For test purposes, it is possible to start the alarms signals in the
”alarm editor”menu using the PLAY/STOP key. They are present on the pre-listen outputs.
Alarm Presets
20 freely programmable presets (user presets) are available; fromAOO to A19. The factory presets are preprogram-
med on the preset numbersA20 - A34. The corresponding functions are explained in the table on page 46. Erasing
these presets is not possible. In orderto create your own alarm preset, modifying an existing, possibly similar alarm
(user or factory preset) and storing it under a new number together with its new title and priority, is the easiest way to
accomplish this task.
Operation menu alarm
Confirming the menu selection ”Alarm’with the soft key ”ok”lets you select the following sub menus using the cursor
< > keys .
Load
Confirming ”load” with the soft key ”ok”, Axx’Titie’and the soft keys ’yes, no”appear on the display. Using the cursor
keys lets you edit the alarm number xx while the corresponding name is displayed. ”Y” loads the selected alarm into
memory while further editing is performed in the ”editor” menu.
Editor
The menu ”editor” allows modification of audio frequencies, envelopes, duty-factors and several other parameters
(see parameter listing). Testing the alarm’s sound properties is possible by starting the alarm sequence using the
PLAY/STOPkey. Thesoundispresentedviathepre-listenoutputs. Parametermodificationsareaudibleafterperforming
a restart. The RECORD-key stops the alarm.
Afterpressingthe”EX]T”key(previousmenulevel),thequestion”storeyes,no?’”appears on the display. Acknowledging
this question lets you save your new settings in a user preset.
Title
Confirming ”Title” with the soft key ”ok”, the name of the currently loaded alarm is displayed. Using the cursor keys
lets you enter a name of up to 8 characters. The soft keys ”A-a”shifts between the upper and the lower character case
while ”spc”inserts a blank character.
After pressing the ”EX17” key (previous menu level), the question ”STORE YES, NO ?”appears on the display.
Acknowledging this question lets you save your new settings in a user preset.
Priority
Confirming ”Priority” with the soft key ”ok”, the priority number of the selected alarm preset appears on the display.
Using the cursor keys, the priority number can be set starting from 00 up to the user priority. Ahigher priority protects
against unauthorized alteration of this preset by users with lower priority level. All factory presets are provided with a
priority of 00, because they cannot be overwritten, anyway. This offers any user the possibility to use them as
prototype sequences.
Afterpressingthe”EXIT”key(onemenuleveldown),thequestion”storeyes,no?’appearson the display. Acknowledging
this question lets you save your new settings in a user preset.
Save
Confirming ”save” with the soft key ”ok”, the currently selected alarm number is displayed. Using the cursor keys, you
are able to enter the number of the desired alarm. Storing a preset has to be confirmed with the soft key ”y = yes”.
With ”save”, all modifications in the above mentioned menu items are saved into the selected user preset. Thus,
individually saving the parameters is not necessary, since they remain in memory until another gong is bein g loaded.

18
List of available alarm parameters
Type Uni-sweep
frequencyl: pitch at sound-start in Hz (min 40Hz, max 9999Hz) is swept until frequency2 is reached.
frequency2: pitch at sound-stop in Hz (min 40Hz, max 9999Hz).
time: duration of the sweep - Freql to Freq2 - in seconds., (min O.Ols, max 99.ggs).
ratio: duty-cycle of the square wave in percent, (min 1 %, max 50%)
repeat: number of repetitions of the sweep Freq 1. > Freq2 (min 1 x, max 9999x).
0000 corresponds to infinite repetition.
Values in parenthesis (). example DIN alarm, A20
Type Bi-sweep
frequencyl: pitch at sound-start in Hz (min 40Hz, max 9999 Hz) is swept until frequency2 is reached.
frequency2: reverse frequency of the sound in Hz (min 40Hz, max 9999Hz) is swept until frequencyl is
reached.
time: sweep duration from freql to inversion point in sec., (min O.Ols, max 99.99s).
The duration of the sweep freql> inversion point > freql is symmetrical.
ratio: duty-cycle of the square wave in percent, (min 1 %, max 50%)
repeat: number of repetitions of the sweep Freq 1.> inversion point (min 1 x, max 9999x). 0000
corresponds to infinite repetition.
Values in parenthesis ( ) example siren, A22
Type continuous sound
frequency: pitch of the sound in Hz (min 40Hz, max 9999Hz)
ratio: duty-cycle of the square wave in percent, (min 1 %, max 50%)
time: duration in sec., (min O.Ols, max 99.99s). 0.00s corresponds to infinite duration.
Values in parenthesis ( ) example BZB all clear signal, A25

19
Type Jump sound
frequencyl: pitch at sound-start in Hz (min 40Hz, max 9999Hz) jumps after timel to frequency2
timel: duration for which freql is heard in sec., (min 0.01 s, max 99.99s).
frequency2: pitch of the sound in Hz (min 40Hz, max 9999Hz) jumps after time2 to frequencyl
time2: duration for which freq2 is heard in sec., (min 0.01 s, max gg.ggs).
ratio: duty-cycle of the square wave in percent, (min 1 %, max 50%)
repeat: number of repetitions of one frequency (min l x, max 9999x). 0000 corresponds to infinite
repetition.
Values in parenthesis ( ) example Post, A23
Type burst
Frequency: pitch of the sound in Hz (min 40Hz, max 9999Hz)
on-time: duration for which the sound is heard in sec., (min 00.01 s, max 99.99s).
off-time: duration of the pause in sec., (min 00.01 s, max 99.99s).
Ratio: duty-cycle of the square wave in percent, (min. 1 %, max. 50%)
repeat: number of repetitions of the sound (min 1 x, max 9999x).
0000 corresponds to infinite repetition.
Values in parenthesis ( ), example ship2, A31

20
Announcement
General:
Using the announcement function provides the possibility to assign incoming audio signals from the recording inputs
(Mic, line, Rec-inp) directly to the sum output. Especially in stand-alone applications this option is particularly useful,
since it will possibly save one microphone amplifier. Starting the function is either performed in the DMM 4650’s
operation menu or remotely controlled via a control line. For external operation a sequence is provided as factory
preset S32 (page 42) which is easily adapted according to individual requirements.
Operation menu announcement
Confirming the menu selection ”announcement”with the soft key ”ok”, ”select new input /evel?”and the soft keys ”yes,
no”are displayed. Adjusting the electronic input level control is performed here. After recording a short test signal, the
control’s new setting is automatically stored and stays. This value is independent of the recording level in Massage
recording. Pressingthe soft key”ok” cancels thelevel adjustment menuand the DMM4650 returns intoannouncement
mode.
The display shows the message ”Announcement” and a bargraph for optical control of the correct input level setting.
The soft key ”vl”allows modifying the pre-listen outputs’ volume setting while ”end”cioses the announcement function.
Setting the recording level a new is required only when the connected signal source is changed or any other large
scale alterations of the input level take place.