Master audio DSP306USB User manual

DSP Series
DSP306USB
DSP408USB
Firmware v9.xx
Software DSPLink v9.xx
Pol. Ind. Norte - Perpinyà, 25
08226 TERRASSA (Barcelona-SPAIN)
Copyright © 2010 [email protected]
All rights reserved www.master-audio.com
Nov 10
User Manual

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DSPSeries - MUS - Ver 1.1 ENG Nov 10 2
ENGLISH
Safety Instructions
1. READ THESE INSTRUCTIONS
All the safety and operating instructions should be read before the product is
operated.
2. KEEP THESE INSTRUCTIONS
The safety and operating instructions should be retained for future reference.
3. HEED ALL WARNINGS
All warnings on the product and in the operating instructions should be adhered to.
4. FOLLOW ALL INSTRUCTIONS
All operating and use of instructions should be followed.
5. DO NOT USE THIS APPARATUS NEAR WATER
Do not use the product near water. For example, near a bathtub, washbowl, kitchen
sink, or laundry tub, in a wet basement, or near a swimming pool, and the like.
6. CLEAN ONLY WITH DRY CLOTH
Unplug the unit from the wall outlet before cleaning. Do not use liquid cleaners or
aerosol cleaners. Use a damp cloth for cleaning.
7. DO NOT BLOCK ANY VENTILATION OPENINGS
Slots and openings in the cabinet back or bottom are provided for ventilation, to
ensure reliable operation of the limit and to protect it from overheating. These
openings must not be blocked or covered. The openings should never be blocked by
placing the product on a bed, sofa, rug, or similar surface. This product should never
be placed near or over a radiator or heat source. This product should not be placed in
a built-in installation such as a bookcase or rack unless proper ventilation is provided
or the manufacture's instructions have been adhered to.
8. DO NOT INSTALL NEAR ANY HEAT SOURCES
This Product should be situated away from heat sources such as radiators, stoves, or
other products (including amplifiers) that produces heat.
9. DO NOT DEFEAT THE SAFETY PURPOSE OF THE POLARIZED OR
GROUNDING-TYPE PLUG
A Polarized plug has two blades with one wider than the other. A grounding-type plug
has two blades and a third grounding prong. The wide blade or the third prongs are
provided for your safety. If the provided plug does not fit into your outlet, consult an
electrician for replacement of the obsolete outlet.
CAUTION
RISK OF ELECTRIC SHOCK
DON’T OPEN
To reduce the risk of fire or electric shock do
not expose this equipment to rain or moisture
WARNING:

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DSPSeries - MUS - Ver 1.1 ENG Nov 10 3
10. PROTECT THE POWER CORD FROM BEING WALKED ON OR PINCHED
PARTICULARLY AT PLUGS, CONVENIENCE RECEPTACLES, AND THE POINT
WHERE THEY EXIT FROM THE APPARATUS.
11. ONLY USE ATTACHMENTS/ ACCESSORIES SPECIFIED BY THE
MANUFACTURER.
12. UNPLUG THIS APPARATUS DURING LIGHTNING STORMS OR WHEN
UNUSED FOR LONG PERIODS OF TIME.
For added protection for this unit during a lightning storm, or when it is left unattended
and unused for long periods of time, unplug it from the wall outlet and disconnect the
antenna or cable system. This will prevent damage to the unit due to lightning and
power line surges.
13. REFER ALL SERVICING TO QUALIFIED SERVICE PERSONNEL. SERVICING
IS REQUIRED WHEN THE APPARATUS HAS BEEN DAMAGED IN ANYWAY,
SUCH AS WHEN THE 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 FROPPED.
14. WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT
EXPOSE THIS APPARATUS TO RAIN OR MOISTURE.
15. APPARATUS SHALL NOT BE EXPOSED TO DRIPPING OR SPLASHING AND
NO OBJECTS FILLED WITH LIQUIDS, SUCH AS VASES, SHALL BE PLACED ON
THE APPARATUS.

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DSPSeries - MUS - Ver 1.1 ENG Nov 10 4
1.INTRODUCTION
The DSP306/408 USB is a complete digital loudspeaker management system
designed for the touring or fixed sound installation markets. The absolute latest in
available technology is utilized with 40-bit floating point processors and high
performance 24-bit Analogue Converters. The high-bit DSP prevents noise and
distortion induced by truncation errors of the commonly used 24-bit fixed-point
devices. A complete set of parameters include I/O levels, delay, polarity, 8 bands of
parametric EQ per channel, 31 bands of graphic EQ per input, multiple crossover
selections and full function limiters. Precise frequency control is achieved with its 1
Hz resolution. Inputs and outputs can be routed in multiple configurations to meet any
requirements.
The DSP306/408 USB can be controlled or configured in real time on the front panel
or with the intuitive PC GUI accessed via the USB interface (or optionally Ethernet).
Software upgrade for CPU and DSP via PC keeps the device current with newly
developed algorithms and functions once available.
Multiple setup storage and system security complete this professional package.
Shipped contents:
-DSP306/408 USB unit
-AC power cord
-USB cable for PC connection
-Pen Drive (USB) with software and User Manual

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DSPSeries - MUS - Ver 1.1 ENG Nov 10 5
2.FEATURES
-3 Inputs and 6 Outputs with flexible routing (DSP306USB)
-4 Inputs and 8 Outputs with flexible routing (DSP408USB)
-40-bit floating point DSP
-High Performance 24-bit A/D Converters
-1 Hz Frequency Resolution
-8 Parametric Equalizers for each Input and Output
-31-band Graphic Equalizer for each Input
-Multiple Crossover types with Full Function Limiters
-Precise Level, Polarity and Delay
-CPU and DSP upgrade via PC
-2-Line x 16 Character Blue Backlit LCD Display
-Full 5-segment LED’s on every Input and Output
-Storage of up to 30 Program Setups
-Security Lock
-USB Interface for PC Control and Configuration
-Ethernet interface option available

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DSPSeries - MUS - Ver 1.1 ENG Nov 10 6
3.THE FRONT PANEL
A) USB Connector – A standard type B USB connector for interface with a PC.
Software and driver must be installed prior to usage.
B) Mute keys - Mute/Unmute input and output channels. When an input channel is
muted, they key will light up in red for indication.
The Mute keys are also used to access the program of each channel in combination
with the Menu> and <Menu keys. Holding one of the Menu keys and pressing the
Mute key of the desired channel will give access to the channel parameters, and will
be acknowledged by a green led below the mute key. Multiple channels can be linked
or unlinked to ease the programming. Inputs and outputs are linked separately.
C) Channel Menu LED – Indicates the activated channels for parameter modification
D) Peak Level LED - Indicates the current peak level of the Signal: Signal, -12dB, -
6dB, -3dB, Overload/Limit. The Input Overload LED references to the device's
maximum headroom. The Output Limit LED references to the threshold of the
limiter.
E) LCD - Shows all the necessary information to control the unit.
F) Menu Control keys - There are 6 menu keys: <Menu (Menu Down), Menu>
(Menu Up), <Select (Cursor Down), Select> (Cursor Up), Enter and Exit. The
functions of each key is explained below:
<Menu: Previous menu screen. In combination with the channel Mute key, the
specific channel Menu is displayed.
Menu>: Next menu screen. In combination with the channel Mute key, the specific
channel Menu is displayed.
<Select: Previous cursor in the menu screen
Select>: Next cursor in the menu screen
F
E
G
B
C
D
A

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DSPSeries - MUS - Ver 1.1 ENG Nov 10 7
Enter: This key has three different functions depending on when it is used:
- In the System Menu is used to proceed with selected actions.
- In the Main Menu allows entering the System Menu.
- In delay and frequency adjustments (1 Hz resolution mode) modifies data values by
100X (used with thumb wheel).
Exit: Exit to the Main Menu
G) Rotary Thumb Wheel - Changes parameter data values. The wheel has travel
velocity sensing which ease large incremental data modifications. For modifying
delay and frequency (1 Hz resolution), pressing the Enter key simultaneously will
increment/decrement the data value by 100X.

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DSPSeries - MUS - Ver 1.1 ENG Nov 10 8
4.THE REAR PANEL
A) Power switch - Controls power On/Off.
B) Main Fuse - T200mA-250V. Slow blow type.
C) Main Power - Connects via a standard IEC socket. A compatible power cord is
supplied with the unit. The voltage input is 90-240VAC, 50-60Hz
D) Ethernet slot – Slot to install the optional Ethernet module. With this accessory,
the unit can be connected to a router, switch or PC through CAT-5 cable.
E) XLR input and outputs - Separate 3-pin XLR connectors are provided for each
audio input and output. The device's output stage employs the balanced
impedance topology. All I/O connectors have pin 1 as ground (shield), pin 2 as +
and pin 3 as -.
E
B
C
D
A

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DSPSeries - MUS - Ver 1.1 ENG Nov 10 9
5.POWER UP
After powering up the unit, the following initialization screen is displayed on the LCD:
The initialization process takes about 8 seconds and during that period the unit boots
and displays the DSP306 or DSP408 firmware version.
After that, the DSP unit displays its main screen:
The screen shows the current program number and program name assigned to the
unit. The program assigned is always the last program the user recalled or stored
before powering down the unit. An asterisk (*) beside the program number means
that the program has been modified but not stored.
Now the DSP unit is ready to operate.
DSP306 v
9
.0
2
MAS
TER DSP306
P01 ____________
MASTER DSP408
DSP408 v
9
.0
2
MASTER DSP408

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DSPSeries - MUS - Ver 1.1 ENG Nov 10 10
6.OPERATING THE DEVICE
6.1.Input Menus
To access the Input Menus, hold the <Menu or Menu> key and press the Mute key of
the desired channel. The green led below the Mute key will light up. More than one
input channel may be selected by holding the Menu key and pressing the
corresponding Mute key. Press Exit to deselect all.
The following menus are available for each input channel:
6.1.1. Signal - Signal parameters
• LEVEL - Gain, -40.00dB to +15.00dB in 0.25dB steps.
• POL - Polarity, can be normal (+) or inverted (-).
• DELAY - Delay in 11us steps. It can be displayed in ms, ft or m. The time unit of the
delay can be changed in the System menu. The maximum delay permitted is 650ms.
6.1.2.EQ - EQ parameters
• EQ# - Selects one of the 8 available Equalizers.
• BYPASS – When set On, the currently selected EQ will be bypassed.
LEVEL:0.00dB
I1:______ Signal
POL:+
I1:______ Signal
DELAY:000.000ms
I1:______ Signal
EQ#:1
I1:______ EQ1
BYPASS:Off
I1:______ EQ1

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• TYPE - Type of EQ. The types can be parametric (PEQ), Lo-shelf (LO-SHF), Hi-
shelf (HI-SHF), 1st degree all-pass (AP-1) and 2nd degree all-pass (AP-2).
• FREQ - EQ center frequency. Ranges from 20 to 20,000Hz in either 1Hz steps or
1/36 octave steps. The frequency steps can be selected in the System Menu.
•BW - EQ Bandwidth. Ranges from 0.02 to 3.61 octaves, in steps of 0.01 octave
steps for PEQ, LO/HI-SHF and AP-2. For AP-1, the bandwidth sets the phase shift at
the centre frequency. This phase is gradually changed from 180 degrees above the
centre frequency to the specified value.
• LEVEL - EQ level gain. Ranges from -30.00dB to +15.00dB in 0.25dB steps.
6.1.3. Input Graphic Equalizer
• GEQ# - Selects one of the 31 available bands, from 20Hz to 20kHz. The selected
frequency is shown.
• LEVEL - GEQ level gain. Ranges from -30.00dB to +15.00dB in 0.25dB steps.
FREQ:1000Hz
I1:______ EQ1
BW:0.33 Q=4.36
I1:______ EQ1
TYPE:PEQ
I1:______ EQ1
LEVEL:0.00dB
I1:__
____ EQ1
DEG:15.
5 deg
I1:______ EQ1
GEQ#:1 f=20
I1:______ GEQ1
LEVEL:0.00dB
I1:______ GEQ1

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• BYPASS – When set On, the currently selected GEQ will be bypassed.
6.1.4.Crossover
• TYPL - Filter Type of low frequency crossover point (high pass). Types can be
Butterworth, Linkwitz-Riley or Bessel.
• FRQL - Filter cut-off Frequency of low frequency crossover point (high pass).
Ranges from 20Hz to 30kHz in either 1Hz steps or 1/36 octave steps. The frequency
steps can be selected in the System Menu.
• SLPL - Filter Slope of low frequency crossover point (high pass). Ranges from 6 to
48dB/octave. If the selected Filter Type is Linkwitz-Riley, the available slopes are 12 /
24 / 36 / 48 dB/octave.
• TYPH - Filter Type of high frequency crossover point (low pass). Same types as for
high pass filters are available: Butterworth, Linkwitz-Riley and Bessel.
• FRQH - Filter cut-off frequency of high frequency crossover point (low pass).
BYPASS:Off
I1:______ GEQ1
TYPL:Off
I1:______ XOver
FRQ
L:1000Hz
I1:______ XOver
SLPL:24dB
I1:______ XOver
TYPH:Off
I1:______ XOver
FRQH:1000Hz
I1:______ XOver

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• SLPH - Filter Slope of high frequency crossover point (low pass).
The following table summarizes all possible crossover configurations:
6.1.5.Comp – Dynamics Compressor
• THRESH - Compressor Threshold. Ranges from -20 to +20dBu in 0.5dB steps.
• ATTACK - Attack time. Ranges from 0.3 to 1ms in 0.1ms steps, then ranges from 1
to 100ms in 1ms steps.
• RELEASE - Release time. Can be set at 2X, 4X, 8X, 16X or 32X the attack time.
Filter config. Low Xover point High Xover point
None TYPL Off TYPH Off
Highpass TYPL not Off TYPH Off
Lowpass TYPL Off TYPH not Off
Bandpass TYPL not Off TYPH not Off
SLPH:24dB
I1:______ XOver
FQRL
FQRH
FQRH
FQRL
THRESH:0.0dBu
I1:______ Comp
ATTACK:10ms
I1:______ Comp
RELEASE:8xAtck
I1:______ Comp

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DSPSeries - MUS - Ver 1.1 ENG Nov 10 14
• RATIO – The compressor ratio determines the slope in which the signal is
compressed. Ranges from 1:1 (no compression) to 1:40 are available.
6.1.6.Name - Channel Name
• NAME - Channel name. It is 6 characters in length.
6.2.Output Menus
To access the Output Menus, hold the <Menu or Menu> key and press the Mute key
of the desired channel. The green led below the Mute key will light up. More than one
output channel may be selected by holding the Menu key and pressing the
corresponding Mute key. Press Exit to deselect all.
The following menus are available for each ouput channel:
6.2.1.Signal - Signal parameters
• Refer to the Input Menus for details
6.2.2.EQ - EQ parameters
• Refer to the Input Menus for details
6.2.3.XOver - Crossover parameters
• Refer to the Input Menus for details
6.2.4.Limit - Output Limiter
• THRESH - Limiter Threshold. Ranges from -20 to +20dBu in 0.5dB steps.
•ATTACK - Attack time. Ranges from 0.3 to 1ms in 0.1ms steps, then ranges from 1
to 100ms in 1ms steps.
NAME:______
I1:______ Name
THRESH:0.0dBu
O1:______ Limit
RATIO: 1:1
I1:______ Comp

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• RELEASE - Release time. Can be set at 2X, 4X, 8X, 16X or 32X the attack time.
6.2.5.Source - Input Source
• 1, 2, 3, 4 – Input channel source for the current output channel. It can be set to mix
the input source (in dB) or disable it (Off). If more than one input source is enabled,
they will be added together as the source for the current output channel.
(Input #4 only available for DSP408)
6.2.6.Ch-Name - Channel Name
• Refer to the Input Menus for details
6.3.System Menu
The System Menu allows the user to control and change parameters that are related
to the system behaviour and general operation. It can be accessed by pressing the
Enter key in the main menu (when no Input/Output or System Menu is activated). All
System Menus require the Enter key to be pressed for the selected action.
ATTACK:10ms
O1:______ Limit
RELEASE:8xAtck
O1:______ Limit
1:0.00
O1:______ Source
2:
-
14.00
O1:______ Source
3:Off
O1:______ Source
4:Off
O1:______ Source

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DSPSeries - MUS - Ver 1.1 ENG Nov 10 16
6.3.1.Recall - Program Recall
The DSP unit has a built-in non-volatile memory that can store up to 30 different
program setups. A program can be recalled using this menu.
• P:# - Program Number to be recalled. Press Enter twice to confirm the operation.
6.3.2.Store - Program store
A program can be stored using this menu. The old program with the same program
number will be replaced. Once the program is stored in the flash memory, it can be
recalled at a later time, even after power down.
• P:# - Program Number for the current data to be stored.
•NAM - Program Name, allows a maximum length of 12 characters.
6.3.3.Config - Device Configuration
• MODE - configures the mode of operation. The possible modes are shown in the
following table:
Mode Out 1 Out 2 Out 3 Out 4 Out 5 Out 6 Out 7
(408 only)
Out 8
(408 only)
None Any Any Any Any Any Any Any Any
Stereo 2-Way In1 In1 In2 In2 Any Any Any Any
Stereo 3-Way In1 In1 In1 In2 In2 In2 Any Any
Stereo 4-Way
(408 only) In1 In1 In1 In1 In2 In2 In2 In2
The unit assigns the Input source for the corresponding outputs when the Mode of
Configuration is selected. The crossover point parameters like the filter type, cut-off
P:1 __
__________
SYSTEM Recall
NAM:____________
SYSTEM Store
P:1
SYSTEM Store
MODE:None
SYSTEM Config

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DSPSeries - MUS - Ver 1.1 ENG Nov 10 17
frequency and slope have to be configured manually in the Xover Menu in each
Output menu.
Note: The configuration mode configures the input sources when selected. The user
can change the source afterwards if desired. It does not keep the configuration in
memory.
6.3.4.Copy - Copy channels
Copy Channels from the source to the target. When the Source and Targets are both
Inputs and Outputs, all audio parameters will be copied. When one of the Source or
the Target is an input while the other is an output, only the Level, Polarity, Delay and
EQ are copied.
• SOURCE - Channel to be copied from.
• TARGET - Channel to be copied to.
6.3.5.General - General system parameters
• FREQ MODE - Selects the frequency control mode for EQ and crossover filters.
Can be 36 steps/octave or All Frequencies (1 Hz resolution).
• DELAY UNIT - ms, ft or m.
6.3.6.Comm – Communication Settings
• BAUD RATE – Sets the baud rate of serial communication. Default is 115200bps.
SOURCE:In1
SYSTEM Copy
TARGET:In2
SYSTEM Copy
FREQ MODE:36/Oct
SYSTEM
Generl
DELAY UNIT:ms
SYSTEM Generl
BAUD RATE:115200
SYSTEM Comm

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• DEVICE ID - Assigns the device an ID from 1 to 16. This ID is useful when a
network of more than 1 unit is present.
• NETWORK ID - Assigns the device an ID from 0 to 60000. This ID is used for future
expansion only, please leave these value at 0.
6.3.7.Passw – Security Password
The factory default password is blank “____”, and it may be changed to any 4-
character combination in this menu.
• OLD PW – The user is required to enter the old password first in order to modify it.
• NEW PW – The new password desired.
6.3.8.Secure – Front Panel Security Lock
The DSPSeries unit enables the user to secure the unit and prevent undesired
changes in the setup by locking all the keys on the front panel. The unit password Is
required to proceed with this action.
• PASSWORD – The user is required to enter the password to lock the unit.
All controls in front panel will be locked. To unlock the unit, press the Enter key and
browse again to the System/Secure Menu. Enter the password again and confirm.
DEVICE ID:1
SYSTEM Comm
NETWORK ID:0
SYSTEM Comm
NEW PW:____
SYSTEM Passwd
OLD PW:____
SYSTEM Passwd
PASSWORD:____
SYSTEM Secure

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6.3.9.Eth-IP – Ethernet IP address
It determines the unique IP address on the unit in the network.
This parameter is only available when the Ethernet card accessory is installed.
6.3.10.Eth-GW – Ethernet gateway
The gateway address of the network, usually the IP address of your router, switch or
hub.
This parameter is only available when the Ethernet card accessory is installed
6.3.11.Eth-SM – Subnet mask
The subnet mask used by your network.
This parameter is only available when the Ethernet card accessory is installed
:192.168.001.020
SYSTEM Eth
-
IP
:192.168.001.001
2
SYSTEM Eth
-
GW
:
255.255.255.000
SYSTEM Eth
-
SM

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7.QUICK REFERENCE
Parameters Menu
<Menu>
Field
<Select> Min Max Steps Units
Level Signal LEVEL -40 +15 0.25 dB
Polarity Signal POL + / -
Delay Signal DELAY 0 62,400 1 11us
steps
EQ Number EQ EQ# 1 8 1
EQ Bypass EQ BYPASS Off/On
EQ Type EQ TYPE PEQ / Lo-Shf / Hi-Shf / AP-1 / AP-2
EQ Level EQ LEVEL -30 +15 0.25 dB
EQ Frequency EQ FREQ 20 30k 1 Hz
EQ Bandwidth EQ BW 0.02 3.61 0.01 Octave
GEQ Number GEQ GEQ# 1 31 1
GEQ Level GEQ LEVEL -30 +15 0.25 dB
GEQ Bypass GEQ BYPASS Off/On
Xover Low Type XOver TYPL Off / Butterworth / Linkwitz-Riley /
Bessel
Xover Low Freq. XOver FRQL 20 30k 1 Hz
Xover Low Slope XOver SLPL 6 48 6 dB/octave
Xover High Type XOver TYPH Off / Butterworth / Linkwitz-Riley /
Bessel
Xover High Freq. XOver FRQH 20 30k 1 Hz
Xover High
Slope XOver SLPH 6 48 6 dB/octave
Compressor
Threshold Comp THRESH -20 +20 0.5 dBu
Compressor
Attack Time Comp ATTACK 0.3 100 0.1/1 ms
Compressor
Release Time Comp RELEASE 2 / 4 / 8 / 16 / 32X Attack time
Compressor
Ratio Comp RATIO 1:1 to 1:40
Limiter
Threshold Limit THRESH -20 +20 0.5 dBu
Limiter Attack
Time Limit ATTACK 0.3 100 0.1/1 ms
Limiter Release
Time Limit RELEASE 2 / 4 / 8 / 16 / 32X Attack time
Source Source 1 to 4 Off +15 0,25 dB
Channel Name Name NAME 6 characters