MAYAH Merk II User manual

Mayah
Communications
Merk II
Audio Codec/Mixer
User Manual
Order-No. MHH001-1

2© MAYAH Communication GmbH
MAYAH, CENTAURI, FLASHCAST are registered trademarks. All other trademarks used are acknowledged with
this.
© Copyright by MAYAH Communications GmbH in 2007
For copying this manual, even by extract, an explicit written permission of MAYAH Communications GmbH is
required.

Table of Contents
Centauri user manual revision level 01 /2007
3
Table of Contents
1Introduction................................................................................................................................. 6
1.1. Overview ...............................................................................................................................6
1.2. Merk II Features ....................................................................................................................7
1.2.1. The Function Keys..........................................................................................................7
1.3. First Steps / Quick Start.......................................................................................................10
1.4. Controls on the Device ........................................................................................................12
1.4.1. Switching On and Off....................................................................................................12
1.4.2. Controlling using the Front Keys...................................................................................12
1.4.3. Mask Display and Key Controls....................................................................................13
1.4.4. Set-up Dialog Selection................................................................................................ 14
1.5. Remote Control using Software...........................................................................................15
1.5.1. Remote Control via RS232 Interface ............................................................................15
1.5.2. Remote Control via IP...................................................................................................15
1.5.3. Automatic UDP-Scan....................................................................................................17
2Installation ................................................................................................................................18
2.1. Scope of Delivery ................................................................................................................18
2.2. Environment and Operating Conditions ............................................................................... 18
2.3. Connections ........................................................................................................................18
2.4. Program Installation.............................................................................................................18
2.5. Start Remote Control Software............................................................................................19
2.6. Control Remote Control Software via the Keyboard using Speed Dialling............................ 19
2.7. Exit Program........................................................................................................................19
3Basic settings........................................................................................................................... 20
3.1. Set Display Language..........................................................................................................20
3.2. Set Time, Date and Date Format.........................................................................................21
3.3. Set Display Contrast/Background Lighting...........................................................................21
3.4. Enter Identification Number .................................................................................................22
4Phonebook................................................................................................................................ 23
4.1. Saving Phonebook on a PC.................................................................................................23
4.2. Transfer phone book to MERK II .........................................................................................23
4.3. Create Entry........................................................................................................................24
4.4. Edit Entry.............................................................................................................................26
4.5. Delete Entry.........................................................................................................................27
5Configuration............................................................................................................................28
5.1. Individual Parameters..........................................................................................................28
5.1.1. Set Encoder.................................................................................................................. 28
5.1.2. Set Decoder ................................................................................................................. 31
5.1.3. Set Inverse Multiplexer („Format“)................................................................................32
5.1.4. Set Communication Interface........................................................................................33

Overview
4© MAYAH Communication GmbH
5.1.5. Set Communication Basic Conditions........................................................................... 34
5.1.6. Set Device Address......................................................................................................35
5.1.7. Configure ISDN Adapter............................................................................................... 36
5.1.8. Setting Dial Protection and ISDN Service Protection....................................................37
5.1.9. Set Quantization Procedure for G.711..........................................................................39
5.1.10. Set Time Limit (Timeout)...........................................................................................40
5.1.11. Switch Dual Mode On/Off..........................................................................................41
5.1.12. Set sources for the input channels............................................................................42
5.1.13. Set Microphone Settings...........................................................................................43
5.1.14. Line In Settings.........................................................................................................43
5.1.15. Headphone Settings.................................................................................................. 44
5.1.16. Line Out Settings ......................................................................................................45
5.1.17. Set Mute ...................................................................................................................45
5.1.18. Mixer Profiles............................................................................................................46
5.1.19. Set Number Of COM Ports To Be Checked.............................................................. 46
5.1.20. Display Hardware Equipment at Program Start.........................................................47
5.1.21. Switch Progress Display On/Off................................................................................48
5.1.22. Release Software Module.........................................................................................49
5.2. Communication Profiles.......................................................................................................50
5.2.1. Compile and Save Communication Profiles..................................................................50
5.2.2. Edit communication profiles..........................................................................................51
5.2.3. Delete communication profile........................................................................................51
5.2.4. Save communication profile on the PC.........................................................................52
5.2.5. Transfer communication profile file to the CENTAURI..................................................52
6Connections/Transmissions.................................................................................................... 53
6.1. Automatic Acceptance of Calls............................................................................................53
6.2. Prepare Connection/Transfer...............................................................................................54
6.2.1. Mix Input Signals and Adjust Level............................................................................... 54
6.2.2. Select the correct bit rate.............................................................................................. 54
6.3. Set up Connection............................................................................................................... 55
6.4. Execute and Monitor Transmission......................................................................................57
6.5. Indications........................................................................................................................... 59
6.6. Cut Connection....................................................................................................................59
6.7. Connection Protocol ............................................................................................................60
7Internet Protocol.......................................................................................................................61
7.1. Remote Control via IP..........................................................................................................61
7.2. Digital Audio via IP ..............................................................................................................61
7.2.1. One IP-packet carries more than one frame................................................................. 62
7.2.2. One frame is carried by more than one IP-packet.........................................................62
7.3. Header information..............................................................................................................63
7.3.1. MPEG Layer 2 / Layer 3 frame header ......................................................................... 63
7.3.2. AAC/CT-aacPlus-Header..............................................................................................63
7.3.3. AAC Low Delay.............................................................................................................63
7.4. HTTP streaming over IP......................................................................................................64
7.4.1. HTTP Streaming........................................................................................................... 64
7.4.2. Structure of HTTP Command Files...............................................................................64
7.4.3. Generating HTTP Command Files................................................................................ 64
7.4.4. Executing HTTP Command Files..................................................................................65
7.5. Establishing IP connections.................................................................................................65
7.5.1. Unicast RTP.................................................................................................................65
7.5.2. Multicast RTP...............................................................................................................66
7.5.3. SAP Streaming.............................................................................................................68
7.5.4. SIP Streaming ..............................................................................................................69

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8Troubleshooting .......................................................................................................................72
8.1. Monitor Device Condition.....................................................................................................72
8.2. Update Device Software......................................................................................................73
8.2.1. Request of the Current Version Status ......................................................................... 73
8.2.2. Software Updating via ISDN.........................................................................................74
8.2.3. Updating via FTP..........................................................................................................75
8.2.4. Updating via Internet ....................................................................................................75
8.2.5. Updating via the RS232 Remote Port...........................................................................75
8.3. Remote Control Software Registry Entries...........................................................................76
8.4. Remote Control Software Superuser Password...................................................................78
9Technical Data ..........................................................................................................................79
Glossary........................................................................................................................................... 80
Menu Tree shown on the Merk II Frontpanel.................................................................................. 82

Overview
6© MAYAH Communication GmbH
1Introduction
The devices of the CENTAURI series are audio gateways; in other words they are audio
codecs with extensive network ability (Internet, Intranet, LAN, WAN). They support all
common coding procedures and transmission protocols.
1.1. Overview
The new MAYAH MERK II is a portable Codec and Mixer. It is based on the well known
and introduced CENTAURI product family. While typical portable devices have restrictions
on the number of audio I/O and compatibility, the MERK II development has focussed on
extended features and functionality in that area:
4 switchable MIC/LINE Inputs, 2 Line Inputs and 4 Headphone Outputs
Switchable Phantom Power 48V with LED indication
10/100 Mbit/s Ethernet for Audio-via-IP and Wireless-LAN
Extended mixing capabilitites including monitor & control
Flashcast compatibility to most of all available audio codecs
Extremely low delay algorithms with apt-X, ADPCM4SB and AAC Low Delay
Electronically controlled potentiometers for full audio mixing remote control
Figure 1: Merk II Portable Audio Codec/Mixer
MERK II supports dual codec mode as well as point-to-multipoint transmissions –the
dream of a reporter to reach up to 8destinations simultaneously with e.g. 64kBit/s AAC
audio quality. Up to four people for extended interview groups or a combination of original
stadium sound plus two interview people can be transmitted simultaneously in stereo with
all mixing parameters under control. Individually controllable send/receive levels for
headphone monitoring allow the right mix for each interview partner.
With Flashcast® technology connectivity is as easy as pushing a button. Directories of
complete set-ups and phone book entries are easy to access. Compatibility to many
available audio codecs is provided in the same and known professionalism as in
CENTAURI® Audio Gateway Codecs. Ergonomic studies have resulted in control and LCD
combination in a user friendly way. The eight keypotentiometers are electronically
controlled and are either level, pan or gain. The selection is performed by four function
keys. The traditional keypad from CENTAURI for navigation and alphanumeric processes
is kept.

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1.2. Merk II Features
Figure 2: Merk II Features
The new Merk II Portable Audio Codec/Mixer consists in part of well known components of the
Centauri family.
•The 128x64 LCD Centauri Frontpanel visualizes the menu and shows all possible settings
•The Mayah Navigation Circle provides an easy way of navigating through the menu structure
•The Centauri Keypad consists of alphanumeric keys which partly have an additional speed dial
function
•4 Function Keys provide the possibility to choose different functions for the controllers
•8 controllers are for adjusting the preselected function
•4 Microphone/Line Inputs on the front and 2 Line Inputs on the rear
•4 Headphone Outputs with 2 different mixes
•2 Line Out/Monitor XLR-Outputs on the rear (see Figure 12)
1.2.1. The Function Keys
Each function key shows a different screen on the frontpanel and preselects the adjustable settings
for the 8 controllers.
F1: Phones-Screen
F2: Input-Screen (optionally front or rear, indicated as long as the function key is pressed)
F3: Gain-Screen
F4: Mute-Screen
Centauri Keypad
128 x 64 LCD for
transprarent user
communication
4 function keys for
flexible purposes and
applications
Well known MAYAH
navigation circle
4 headphone outputs with 2
different mixes 4 MIC/LINE inputs with switchable
phantom power, limiter, compressor,
filter etc.
8 digital controllers for various
purposes, such as level, pan, gain,
send/receive headphone mix, etc.,
4 peak level indications

Merk II Features
8© MAYAH Communication GmbH
•F1: Phones-Screen
•F2: Input-Screen (optionally front or rear, indicated as long as the function key is pressed)
•F3: Gain-Screen
•F4: Mute-Screen
NOTE: The 4 red peak-LEDs, each for every input channel on the front side, are only relevant while
operating with microphones! They will be lit, if an overmodulation of the A/D-converter occurs. In this
case the gain of the entrance amplifier has to be lowered until the LED expires.
During LINE-operation the red LED will only be lit, if the headroom of 18 dBu is used to full capacity.
The entrance level then has to be lowered accordingly, since the Merk II doesn’t feature a
potentiometer in front of the A/D-converter.
Additionally there is one popup-screen which appears if one of the controllers is turned during the
normal menu display of the frontpanel. This popup-screen will automatically disappear again after a
specific time-period.
•Popup-Screen
Note: It is possible to control and change all settings made with function-keys and controllers ex post
in the studio which makes an error correction available.

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The block diagram shows how the Merk II works:
Figure 3: Merk II block diagram
Event-dependent Control
CENTAURI Gateways can be programmed such that they react to particular, pre-determined events
in a set way. Events can thus be linked with actions.
The event-dependent control is described in the Centauri Communication Reference Manual and
several Application Notes. Please take note of our notifications (also in the Internet under
http://www.mayah.com).

First Steps / Quick Start
10 © MAYAH Communication GmbH
1.3. First Steps / Quick Start
The Merk II Portable Audio Codec/Mixer has a display and a keyboard on the front of the
device. You can therefore set up a connection to another communication partner im-
mediately as soon as you have unpacked such a device and connected it up to the mains
and ISDN.
The information shown on the display of the Merk II can appear in different languages
(can be pre-set, see section "Set Display Language"). On delivery the devices are set
to the English language. This is why all the corresponding illustrations in this handbook
show the English language display.
To set up an immediate connection, proceed as follows:
•Switch on the device. The switch is to be found on the rear of the device (see Figure
12). After a short time the MERK II start mask appears on the Display:
Figure 4: The MERK II Start Mask
•Select CONNECT with the arrow key and press .The Connect Dialog will now appear
on the display:
Figure 5: Connect Dialog Mask
There are already entries with test numbers entered in the phone book when the device
leaves the works.
•If you want to try out one of the available test numbers, select PHONEBOOK and press
. A list will then appear showing all the entries set at the works.
•Select one of the phone book entries with the and keys and press . The
device then immediately begins to create a connection to the selected number.
You can also enter an ISDN phone number manually and then set up a connection to the
same number. This can be any ISDN phone number.
•To set up an immediate connection to a new subscriber, select DIRECT DIAL and
press . Only one input request for the new ISDN phone number appears on the
display.
•Press , use the number keys to enter the number for DEST.1 and the press .
again.
•If required set DEST. 2 and enter the second number in the same manner.
•Select CONNECT!. The device now immediately starts to set up a connection to the
numbers entered.