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VigilLink VLDT-AP0808 User Manual

8x8 audio processor
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8x8 Audio Processor
VLDT-AP0808
VER 1.1

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Summary of Contents for VigilLink VLDT-AP0808

  • Page 1 8x8 Audio Processor VLDT-AP0808 VER 1.1...

  • Page 2: Table Of Contents

    Thank you for purchasing this product For optimum performance and safety, please read these instructions carefully before connecting, operating or adjusting this product. Please keep this manual for future reference. Surge protection device recommended This product contains sensitive electrical components that may be damaged by electrical spikes, surges, electric shock, lighting strikes, etc.

  • Page 3: Introduction

    1. Introduction This digital audio processor is typically used for video conference, distant learning, and telemedicine. It features 8-ch MIC/linear inputs, and 8-ch linear outputs. The product can process audio signals with algorithms, such as, full-band Adaptive Echo Cancellation (AEC), Adaptive Noise Suppression (ANS), Automatic Gain Control (AGC), and Auto Mixer, to output a clear, clean and resonant sound with high Signal-to-Noise ratio.

  • Page 4: Package Contents

    Package Contents ① 1 x Digital Audio Processor ② 1 x AC 100~240V 50/60Hz Power Cord ③ 1 x 3pin-3.81mm Phoenix Connectors (Male) ④ 1 x 10pin-3.81mm Phoenix Connectors (Male) ⑤ 4 x 12pin-3.81mm Phoenix Connectors (Male) ⑥ 2 x Mounting Ears (Wall Mount) ⑦...

  • Page 5: Operation Controls And Functions

    4. Operation Controls and Functions 4.1 Front Panel Name Function Description POWER LED When the device is powered on, the red LED will light on. When the device runs in normal, the green STATUS LED will STATUS LED flash. 4.2 Rear Panel 6 7 8 MIC +48V MIC/LINE INPUTS...

  • Page 6: Host Computer Control

    5. Host Computer Control 5.1 Connection The audio processor admits the control of a host computer in windows system (WIN 7 or WIN 10). Take a cable to connect to the LAN port of the processor with the computer for network connection as following steps instructed.
  • Page 7 If there is a red X at the top-right corner of this icon as the figure above shown, it means the host computer have not connected with the audio processor yet. In such case, click this icon, then a dialog box with a list of IP addresses of all connected devices will pop out, as the following figure shown.

  • Page 8: Volume Meter

    5.2 Volume Meter The volume meter is typically to denote the signal level of the I/O volume. The meter has 3 colors (Red, Yellow and Green) to denote signal levels for the volume of 8-ch inputs and 8-ch outputs, in which the Red denotes that volume may be too high to be limited and the yellow indicates the volume is within a reasonable range.

  • Page 9: Expander

    You can set signal parameters of an input channel by entering its CHAN No. on the right panel of the IN page. Audio process modules, such as, EXPANDER, EQUILIZER, COMPRESSOR and AUTO GAIN CONTROL, are available on the right panel for your setting.

  • Page 10: Equalizer

    ATTACK: The time required by the Expander to begin the Expander process once a signal drops below threshold. Values are squashed between [1, 500] ms. RELEASE: The time required by the Expander to stop the Expander process once a signal is over threshold.

  • Page 11: Compressor

    The figure below shows the setting page of the EQ module. TYPE: Provides 5 types of band/filter, with H-Pass, L-Pass, H-Shelf, L-Shelf and Peaking optional. FREQUENCY : In High/Low Pass Filter, it means the cut-off frequency of the EQ band; In Peak Filter, it means the center frequency point of the EQ band;...
  • Page 12 The figure as below shows the setting page of the compressor. THRESHOLD: The level that the signal above it will be compressed, with a scale of [-60.0, 0.0]dB. RATIO: The compression ratio for signals with level above threshold, with a scale of [1.0, 20.0].

  • Page 13: Auto Gain Control

    A pair of UP-DOWN arrows on the right panel is also provided for you to select any input channel for the Compressor configuration. 5.7 Auto Gain Control Automatic Gain Control (AGC) intends to control the audio signal within a range so as to extend the distance of pick-up sounds.

  • Page 14: Auto Mixer

    MAX GAIN: It will affect the smooth adjustment of the gain value of the signal between the threshold and the target level, with a scale of [0.0, 12.0] dB. THRESHOLD: Signals below threshold will remain unchanged while those between threshold and target level will be amplified (at a ratio determined by the TARGET LEVEL, RATIO and MAX GAIN).

  • Page 15: Adaptive Feedback Cancellation

    The figure as below shows the setting page of the Auto Mixer module. AUTO: Click AUTO to add the corresponding input MIC to the auto mixing system. Then you can use the fader of the MIC input channel to adjust its signal level for controlling the mixed volume on the input channel, or click MUTE to mute the MIC input channel.
  • Page 16 The following figure shows the AFC setting page in detail. LOCAL INPUT: The source input channels. You can select the channel based on actual access conditions. AUTOMIXER refers to mixed signals after the AUTOMIXER process. MAX DEPTH: The maximum amount of gain that the module allows to reduce, with a scale of [-20.0, 0.0] dB.

  • Page 17: Adaptive Echo Cancellation

    5.10 Adaptive Echo Cancellation The 48kHz full-band Adaptive Echo Cancellation (AEC) algorithm is set to eliminate echoes coming from the far end in a remote video conference. As shown below, clicking the AEC module on the HOME page or the AEC tab on the menu bar will allow you to enter the AEC configuration page.

  • Page 18: Adaptive Noise Suppression

    As shown in the figure above, we choose IN5 as reference signals, in such case, we need to connect the IN5 port of the processor to the terminal of the video conference. As the reference signal after the AEC algorithm will be send to the far end by the terminal, we also need to configure selected input channels in the matrix routing.

  • Page 19: Matrix Mixer

    LOCAL INPUT: The source input channels. You can select the channel based on actual access conditions. AUTOMIXER refers to mixed signals after the AUTOMIXER process. ANS LEVEL: The ANS module provides 12 noise suppression levels, ranging from 6dB to 18dB. ACTIVE: Activates the ANS process.

  • Page 20: Output Settings

    5.13 Output Settings As shown below, clicking the OUTPUT module on the HOME page or the OUT tab on the menu bar will allow you to enter the OUTPUT setting page. The figure as below shows the details of the setting page. INVERT: When pressed, inverts the polarity of the signal on the channel.

  • Page 21: Two-Way Crossover

    5.14 Two-way Crossover The two-way crossover consists of a High Pass Filter and a Low Pass Filter, which can divide the input signal up into 2 discreet audio bands (Low and High). As shown below, pressing the 2-WAY module on the HOME page or the 2-WAY button on the right panel of the OUT page, you will enter the configuration page.

  • Page 22: Delay

    A pair of UP-DOWN arrows on the right panel is available for you to select an output channel for the Two-way Crossover configuration. 5.15 Delay The Delay module is typically used to delay the output speed of audio signals, which can be applied to meet the purpose of Lip Sync in a video conference.

  • Page 23: Limiter

    A pair of UP-DOWN arrows on the right panel is also provided for you to select an output channel for the Delay configuration. 5.16 Limiter A Limiter can reduce the dynamic range of signals by strictly limiting the maximum output level so as to ensure that the connected amplifier won’t be overloaded because of signals with high signal level.

  • Page 24: Scene Management

    THRESHOLD: Shows that level signals above threshold will be attenuated, with a scale of [-60.0, 0.0] dB. RELEASE: The time required by the Limiter to stop the LIMITER process once a signal is below threshold, with a scale of [1, 1000] ms. G.R.

  • Page 25: Serial Settings

    By default, the file is saved in .xml file format. Modify Name: When pressed, the scene name displayed on the window will be changed. Save: When pressed, the scene currently configured will be saved. Reset: When pressed, the processor will go back to the factory settings. 5.18 Serial Settings You can configure the RS-232 serial parameters by clicking “Tools”...

  • Page 26: Gpio Setting

    All RS-232 control commands, such as, Scene Management, I/O Control, Modules’ Configuration, and Device Information, can be found in the page. The command code will be listed at the bottom of this page once you have selected the Type, Command, Channel, Band from the drop-down box and entered its value.

  • Page 27: Software Update

    5.22 Software Update In the network connection state, select the “Help” menu in the upper left corner of the host computer software, and select the “Upgrade” option, as shown in following figures. In the above figure, DSP Version indicates the current version information. Select “Browse” to select the local update file for software update.

  • Page 28: Tcp/Ip Control Command

    6. TCP/IP Control Command The product supports TCP/IP command control. Connect the LAN port of the product to a PC, then open a TCP/IP Command tool on PC to send TCP/IP commands to control the product. The TCP/IP command list about the product is shown as below. TCP/IP Commands Service Port Number: 3433 The control command ends with “\n”, and no symbols in the form of "\n"...
  • Page 29 HAmx (Auto Mixer) <HAmx><In >…</In></HAmx> It is used to control the auto mixer function. no: Channel number, no=0~7. mu: Mute switch, mu="0" (unmute), mu="1" (mute). Field pry: Priority, pry=0~10，A larger value indicates a higher priority. ><: Level value of the auto mixer channel. The value range is [-100, 12]dB. <HAmx>...
  • Page 30 HAhc (Adaptive Feedback Cancellation) <HAhc><In>…</In></HAhc> It is used to control the input source selection and other functions of the AFC module. ahc: Reserved ans: ANS switch or noise suppression level for the AFC module, ans=0 or 6~18, ans="0" Field (Disable ANS), ans="6"~"18" (noise suppression level). no: Channel number, no=0~7 or 96.
  • Page 31 HDly (Delay) <HDly></HDly> The delay module is mainly used to delay sound playing. no: Channel number, no=100~107. Field bypass: bypass or not，bypass="1" (signal bypass)，bypass="0" (not bypass). ><: Cut-off frequency. The value range is [0, 500]ms. <HDly no="104" bypass="0">300</HDly> Example Indicates: Enable the delay module on output channel 104 (i.e. the analog output channel 5) with a delay value of 300ms.
  • Page 32 <HExp no="2" opt="1" thrd="-450" rate="20" wd="0" atktm="10" rlstm="100"></HExp> Example Indicates: Enable the Expander function on input channel 2, and set the threshold value to -45dB, compression rate to 2, hard knee, attack time to 10ms, and release time to 100ms. HCom (Compressor) <HCom></HCom>...
  • Page 33 HUart (Uart Parameter Configuration) <HUart></HUart> It is used to configure the parameters of the third-party control serial port, such as the baud rate. ><: Baud rate. The value can be 300, 600, 1200, 4800, 9600, 14400, 19200, 38400, Field 56000, 57600, or 115200. <HUart>9600</HUart>...

  • Page 34: Rs-232 Control Command

    7. RS-232 Control Command The product supports RS-232 command control. Connect the RS-232 port of the product to a PC, then open a Serial Command tool on PC to send ASCII commands to control the product. The ASCII command list about the product is shown as below. ASCII Commands Serial port protocol.
  • Page 35 Command Code Function Description Example Feedback Default Setting input 1 expander Set the attack time, s in 1 expd on s in x expd on is active and set x=1~8, attacktime 10! attacktime z! z=1~500 attacktime 10ms Set the release time, input 1 expander is s in 1 expd on s in x expd on...
  • Page 36 Command Code Function Description Example Feedback Default Setting Set the agc rate, s in 1 agc on s in x agc on input 1 agc is active x=1~8, rate 30! rate z! and set rate 3.0 z=10~200 input 1 agc is Set the maximum gain value, s in x agc on s in 1 agc on...
  • Page 37 Command Code Function Description Example Feedback Default Setting Adaptive Feedback Cancellation s afc hit 1! afc hit 1 s afc hit x! Select the input, x=1~8 s afc remove 1! afc remove 1 Remove the input, x=1~8 s afc remove x! afc is active s afc on! Enable AFC...
  • Page 38 Example Command Code Function Description Feedback Default Setting Set the Q value, s out 1 peq on output 1 peq is s out y peq on y=1~8, band 1 on wide active and set band band b on wide b=1~8, 1 wide 0.02 z=2~5000 Set the gain value,...

  • Page 39: Troubles And Solutions

    8. Troubles and Solutions If the output audio is abnormal, you may need to check following items at first: ☆ Whether the STATUS LED is normal. ☆ Whether the INPUT/OUTPUT VOLUME is turned down to the lowest level. ☆ Whether cables are in right connection. ☆...

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