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AGILE AV dsp amp User Manual

Av dsp amp
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AV dsp amp

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Summary of Contents for AGILE AV dsp amp

  • Page 1 User Manual AV dsp amp...

  • Page 2: Table Of Contents

    AV dsp amp User manual version 1 Table of contents Product description ............3 Type remarks ............3 Key features ............3 Applications ............4 Connections ............5 System information ............7 Description ............7 Hardware Architecture ..........8 Digital audio input ............. 8 Audio performance data ..........

  • Page 3: Product Description

    User manual version 1 Product description Type remarks The first time the AV dsp amp is used all biquads are zero, so there are no filters installed. Connecting any speakers and audio input at this point may cause some damage to them.

  • Page 4: Applications

    By this you will have the opportunity to build a 3-way system. Connections Figure 1 Overview of the connections on the front of the AV dsp amp. Function Amplifier output, for slave speaker in stereo setup Analogue input left channel...
  • Page 5 AV dsp amp User manual version 1 IR in (3,5mm); max 4,5V USB control input Master trigger output, slave trigger input Right channel trough ~230 volt input Digital version only: SPDIF audio input SPDIF audio output Audio trough for slave module...

  • Page 6: System Information

    “ ” 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.

  • Page 7: Hardware Architecture

    User manual version 1 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.

  • Page 8: Product Overview

    Please do not connect any speakers 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:...

  • Page 9: Control Panel

    AV dsp amp User manual version 1 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.
  • Page 10 Figure 6 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).

  • Page 11: Filter Design

    AV dsp amp User manual version 1 channel that contains any valid audio is selected and becomes the new input source. But if you put in the USB cable but you want to use the analogue input you can force the analogue input to be used. This can be done for all inputs, the options Analogue, SPDIF and USB Audio.

  • Page 12: Graph Area

    AV dsp amp User manual version 1 Figure 8 Graph Area The magnitude tab shows the imported driver responses, filters, individual biquads, individual filtered driver responses and the sum. Colour Function Blue, thin Measured woofer response Green, thin Measured midrange response Red.

  • Page 13: Filter Definition Area

    AV dsp amp User manual version 1 Orange, thick Response of selected biquad Black, thick Sum response Having all of these on at the same time quickly produces an intractable mess so these graphs can be separately enabled or disabled in the filter definition area.

  • Page 14: Work Flow

    AV dsp amp User manual version 1 filter design application of what that sampling rate is. In short, leave this at 48kHz. The select button opens a file dialogue box witch is not used in this application. Work flow Measurement Measuring using the DSP unit set to “flat”...
  • Page 15 AV dsp amp User manual version 1 The first echo is apparent at 5ms. Zoom in until you see only the anechoic portion of the impulse response. Dragging the mouse, left-button down, from left to right marks a zoom area. Dragging from right to left zooms out. Dragging with the right button down pans the plot left and right.

  • Page 16: Designing Filters

    AV dsp amp User manual version 1 Designing filters Biquad Parameters function Unity Section is not used LPF1 Cut-off frequency (always First order lowpass -3dB) LPF2 Cut-off frequency Second order lowpass. A Q of (asymptotically) 0.71 corresponds to butterworth. 0.5 corresponds to LR2.

  • Page 17: Download

    “ ” Under download the user can press load DSP to download its designed filters to the AV dsp amp. Firmware update Every module has the ability to update its firmware, when provides a new firmware version. The firmware version of the module is shown in the statusbar of the filter design window and under About.

  • Page 18: Examples

    This example will guide you through setting up you 2-channel stereo system with the AV dsp amp, picture of this kind of setup is given in Figure 4. The master module is always the one with the control panel connected.
  • Page 19 AV dsp amp User manual version 1 6. Set the system to the desired setup, for this example 2-channel – where the master represents the Left speaker Figure 12 7. When needed set the desired input, for now just leave it Auto detect.
  • Page 20 Turn on the master by control panel or remote Lower you source volume, prevent loud start-up volume Connect your source to the AV dsp amp Ready! Now the system is fully setup and can be controlled by the control panel, remote control or by connecting the module to your pc.

  • Page 21: Example 2: Stereo Setup With Active Subwoofer

    Example 2: Stereo setup with active subwoofer This example describes how to set up a stereo passive filtered audio system plus an active subwoofer (with or without filtering) with use of one AV dsp amp. This setup is shown in Figure 3.

  • Page 22: Technical Data

    AV dsp amp User manual version 1 Now the system is fully setup and can be controlled by the control panel, remote control or by connecting the module to your pc. From now on you can update your filters at any time, just repeat the steps of this example.

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