AGILE AV dsp amp User manual

User Manual
AV dsp amp

User manual version 1 AV dsp amp
Table of contents
Product description ...................................................... 3
Type remarks ........................................................... 3
Key features ........................................................... 3
Applications ........................................................... 4
Connections ............................................................ 5
System information .......................................................
Description ............................................................
Hardware Architecture .................................................. 8
Digital audio input ..................................................... 8
Audio performance data .................................................. 8
Remote control ......................................................... 8
Product overview ......................................................... 9
Hardware part .......................................................... 9
Software installation ................................................. 11
Control panel ......................................................... 11
Filter design ......................................................... 12
Graph Area ............................................................ 13
Filter Definition Area ................................................. 14
Settings window ....................................................... 14
Work flow ............................................................. 15
Measurement ......................................................... 15
Designing filters .................................................... 1
Download .............................................................. 18
Firmware update ......................................................... 18
Examples ............................................................... 19
Example 1: 2-channel stereo setup ....................................... 19
Example 2: Stereo setup with active subwoofer ........................... 21
Technical data .......................................................... 22
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User manual version 1 AV dsp amp
Product description
Type remarks
Firmware version 1.3 (October 2009)
Key features
•Compact design
•Personal Computer controlled
•Two UcD100 power amplifiers
•Pop-free start and stop control
•Stereo analogue input
•Subwoofer output
•Fully user customised filtering
•Button panel controlled
•Remote controlled
•Link communication master / slave (only with two modules)
•Low signal to noise (-100dB)
Optional features, by adding a digital audio board.
•SPDIF stereo audio input
•Input sample rates up to 192kHz
•Link communication trough SPDIF link cable (one cable for audio and
link)
•USB audio input
•Low signal to noise (-104dB)
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-The first time the AV dsp amp is used all biquads are zero, so there are no filters
installed. onnecting any speakers and audio input at this point may cause some
damage to them.
-Take notice on what changes you make, changing a 2channel modules to stereo
setup can damage your speakers because both channels may be full range!
-After updating the firmware please be sure to also download the latest version of
the manual from our website

User manual version 1 AV dsp amp
Applications
With one module the following applications can be set up, further explained in
the “Hardware part chapter :”
•Stereo passive filtered system
•Briged mode for single subwoofer (max 140Watt into 4 Ohms)
•Mono/mid 2-way setup (tweeter + sub)
When two modules are used the following applications can be set up, also
explained in “Hardware part :”
•2-way active filtered stereo system
•2 channel system with active subwoofer
•2 channel system, both modules in bridge mode for more power
All setups are both possible with analogue and optional with the digital audio
inputs SPDIF and USB.
Note that all setups have the ability to use an extra channel by connecting a
active subwoofer to the subout. By this you will have the opportunity to build a
3-way system.
onnections
Figure 1
Overview of the connections on the front of the AV dsp amp.
Function
1Amplifier output, for slave speaker in stereo setup
4Analogue input left channel
5Analogue input right channel
6Subwoofer output
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User manual version 1 AV dsp amp
7IR in (3,5mm); max 4,5V
8a USB control input
9Master trigger output, slave trigger input
Right channel trough
11 ~230 volt input
Digital version only:
2SPDIF audio input
3SPDIF audio output
Audio trough for slave module
8b USB audio input
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User manual version 1 AV dsp amp
System information
Figure 2
Description
The AV dsp amp is a class D amp for use in powered speaker systems. As an active“ ”
speaker controller, a AV dsp amp can form the basis of a powerful active two-way
monitor. In stereo mode one AV dsp amp will power an active master / passive
slave pair. Finally, the module may also be used as a one-way 140W amplifier.
All signal processing, including volume control, is done using the on-board
DSP (digital signal processor).
Figure 1 shows the block diagram of the amplifier. When two modules are used,
the second unit slaves to the first unit (master) through a link cable. The link
cable (a stereo mini jack cable) carries both the right audio channel and
control data. This way, both units respond to the master’s control panel.
A PC controls the AV dsp amp through the USB port. This connection is used to
upload the configuration and filter settings. An optional board permits use of
the USB link for audio as well as an SPDIF link. In digital mode, master/slave
linking is done through the SPDIF in/out connections instead of the mini jack
cable.
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User manual version 1 AV dsp amp
Hardware Architecture
The standard version of the AV dsp amp has a stereo analogue audio input. This
analogue signal is converted to digital, processed by the DSP and then
converted back to analogue. A microcontroller controls the DSP, reads the
control panel and communicates with the PC and/or another AV dsp amp that may be
attached.
Digital audio input
The optional digital input board plugs into the main PCB and carries two RCA
connectors, SPDIF in and SPDIF through. Incoming SPDIF is linked through
directly to the output and sent to the DSP through an asynchronous sample rate
converter (ASRC) for jitter removal. The USB part adds a hub and an audio device
which in turn also transmits audio over the ASRC to the DSP. The ASRC chip scans
its input for whichever signal is active. In a stereo setup and in digital mode
the SPDIF through cable doubles as a master/slave link, obviating the need for
the mini jack cable. The mini jack cable remains functional though and does not
have to be removed.
Audio performance data
MBW=20kHz, unless otherwise noted. All filters set to unity. Noise levels
unweighted.
Item Symbo
l
Mi
n
Typ Max Unit Notes
Input level Vin 2.2 V
Input impedance 10k Ohm Analogue cinch
inputs
Output level LS1 100 W Into 4 Ohms
LS2 100 W Into 4 Ohms
Signal/Noise SNR 100 dB ADC
104 dB DAC
Total harmonic
distortion+Noise
THD+N TBD
Analogue sampling rate Fs 48 kHz
Delay per channel 0 0 340,
3
cm Set in software,
not for subout
channel
0 0 1000 us
Supported digital
sampling rates
Fs 32, 44.1, 48,
88.2, 96, 192
kHz All input rates
converted to 48kHz
Gain 20 dB volume at 0dB
Remote control
The master unit is fitted with small control panel which is placed on the front
of AV dsp amp. Volume and standby/on is controlled by the pushbuttons and by a
infrared remote control. When 2 AV dsp amp modules are used only one control
panel is needed, because the trigger communication between master and slave.
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Stereo
audio in Right speaker
Left speaker
P amp V1.0
Led
Volume
Down
Volume Up
Ir Reciever
On/Off
ontrol
Panel
Figure 3
User manual version 1 AV dsp amp
Product overview
Before you can use the AV dsp amp in your particular setup, you first have to set
the right settings. This is done by pc software, called DSP filter design.
Please do not connect any spea ers to your system yet!
When you want to set up a system with the AV dsp amp you apparently know what you
want. So with this information you can setup your system as follows:
Hardware part
Stereo setup: Connect the module to your pc by a USB cable and select on witch
side of the room your master module will be, the speaker with the
AV dsp amp. When your master is the left channel the slave will
become the right channel. When you want to set the master as
right channel with analogue input you will have to change the
input cinches, left in the right cinch and right in the left.
This is because only the right channel is linked trough, so if
you want the left channel to be linked trough you just switch
left and right. For digital sources the left and right channel
are linked.
Bridged
setup: Connect the module to your pc by a USB cable and select
where the master module is placed, master module is left or
right audio or functions as a subwoofer. When you use 2 AV dsp
amp for a stereo bridged setup you will also have to initialise
the second (slave) module, see example in the last chapter of
this document.
In bridged mode the jumper (see figure 2) must be placed and the
speaker must be connected between J4 speaker+ and J2 speaker+.
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User manual version 1 AV dsp amp
In all other setups the jumper is not placed!
When you want to set the master as right channel with analogue
input you will have to change the input cinches, left in the
right cinch and right in the left. This is because only the right
channel is linked trough, so if you want the left channel to be
linked trough you just switch left and right. For digital
sources the left and right channel are linked.
2 Channel: Connect the module to your pc by a USB cable and select what kind
of 2 channel you want to setup. When you want to set the master as
right channel with analogue input you will have to change the
input cinches, left in the right cinch and right in the left.
This is because only the right channel is linked trough, so if
you want the left channel to be linked trough you just switch
left and right. For digital sources the left and right channel
are linked. An example is given in the last chapter of this
document.
On all setups there is also the ability to use the Line out sub. This can source
an active subwoofer module.
When 2 modules are used these two can be linked by a trigger cable. This cable
holds device data and also carries a audio channel on analogue source. If the
digital board is installed then the SPDIF link cable can be used to communicate
between the 2 modules. This cable is placed from master SPDIF out to slave SPDIF
in cinch. The trigger cable is no longer needed in this setup. On USB audio
input on the master the SPDIF output is also used for linking master to slave.
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P amp V1.0
Led
Volume
Down
Volume Up
Ir Reciever
On/Off
Stereo
audio in
ontrol
Panel
trigger +
right ch
LF HF LF HF
Figure 4

User manual version 1 AV dsp amp
Software installation
System requirements:
•Pentium class or higher
•64MB RAM
•USB1.0 or higher
Tested on Windows 2000, XP, Vista, Windows
All files are compressed in the setup.zip file. This zip file contains 2 DLL
files for communication and a .EXE file, which represents the DSP filter
design program.
1. Unzip the setup.zip file on your hard disk
2. Open the DSP filter design.EXE by double clicking the file“ ”
ontrol panel
Now the program is ready for use.
You see the following window,
called the control panel.
Figure 5
When the program is running connect your AV dsp amp to your
pc by the USB cable. Windows will automatically detect and
install the AV dsp amp and the USB audio device. When the
installation is done the connected window will appear and
the connection light will turn green. You can also manually
make a connection by the connect button, on the bottom“ ”
right of the control panel.
Now you can adapt the settings of the AV dsp amp real time through USB. On the
left of the control panel you see the Force input and active input groups. This
shows you the settings of the audio inputs of the AV dsp amp, and lets you
control these inputs (only when digital audio board is added).
Audio can be provided in 3 ways, analogue, SPDIF and USB audio. The selection of
any of these inputs can be automatic, auto detect . This means that when any of“ ”
the inputs is presented there will be switched to this channel automatically.
This is done by setting the analogue input as the standard source. During
analogue in the other two inputs are scanned for any valid signal. The first
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Figure 6