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BZBGEAR BG-A88M User Manual

8x8 digital audio processor
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BG-A88M
8x8 Digital Audio Processor
User Manual

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Summary of Contents for BZBGEAR BG-A88M

  • Page 1 BG-A88M 8x8 Digital Audio Processor User Manual...
  • Page 2 BZBGEAR BG-A88M PRODUCT MANUAL · · Address: 830 National Drive #140, Sacramento, CA 95834, USA Tel: +1(888)499-9906 Email: support@bzbgear.com...

  • Page 3: Table Of Contents

    BZBGEAR BG-A88M PRODUCT MANUAL Table of Contents Statement Safety Precaution Introduction Features Package Contents Specifications Device Interface Descriptions Computer Control Volume Meter Input Settings Expander Equalizer Compressor Auto Gain Control Auto Mixer Adaptive Feedback Cancellation Adaptive Echo Cancellation Adaptive Noise Suppression...

  • Page 4: Statement

    ● This product does not contain parts that can be maintained or repaired by users. Damage caused by dismantling the product without authorization from BZBGEAR is not covered under the warranty policy. ● Installation and use of this product must strictly comply with local electrical safety standards.

  • Page 5: Introduction

    BZBGEAR BG-A88M PRODUCT MANUAL Introduction The BG-A88M is a digital audio processor which offers 8-ch balanced MIC/linear inputs and 8-ch balanced linear outputs. It features adaptive feedback suppression, full-band adaptive acoustic echo cancellation, and dynamic adaptive noise reduction technology. The Auto Mixer function allows users to set a priority when multiple microphones are used.

  • Page 6: Package Contents

    BZBGEAR BG-A88M PRODUCT MANUAL Package Contents ① 1 x BG-A88M ② 1 x AC 100~240V 50/60Hz Power Cord ③ 1 x 3-pin - 3.81mm Phoenix Connector (Male) ④ 1 x 10-pin - 3.81mm Phoenix Connector (Male) ⑤ 4 x 12-pin - 3.81mm Phoenix Connectors (Male) ⑥...

  • Page 7: Device Interface Descriptions

    BZBGEAR BG-A88M PRODUCT MANUAL Device Interface Descriptions Front Panel Name Description POWER LED When the device is powered on, the red LED will be illuminated. When the device is running normally, the green STATUS LED will flash. STATUS LED Rear Panel...

  • Page 8: Computer Control

    Computer Control Connection The BG-A88M audio processor can be controlled via the provided software on a Windows 7/10/11 machine. Use a category cable to directly connect to the LAN port of the processor to your computer or via your local network using the following steps.

  • Page 9: Volume Meter

    BZBGEAR BG-A88M PRODUCT MANUAL If there is a red X, click the icon and a dialog box of all IP addresses from connected devices will appear as seen in the following image. Step 5: Choose the audio processor’s IP address and click CONNECT. The processor will now be connected with the host computer.

  • Page 10: Input Settings

    BZBGEAR BG-A88M PRODUCT MANUAL Input Settings As shown below, clicking the INPUT module on the HOME page or the “IN” tab on the menu bar will open the INPUT setting page. The following figure shows the details of the INPUT setting page.

  • Page 11: Expander

    BZBGEAR BG-A88M PRODUCT MANUAL Expander The Expander can extend the dynamic range of the input signal and is used to eliminate noise under a certain threshold. As shown below, clicking the EXP module on the HOME page or the EXP button in the right panel of the IN page will open the EXP setting page.

  • Page 12: Equalizer

    BZBGEAR BG-A88M PRODUCT MANUAL ACTIVE: Activates the EXP process. It is equivalent to clicking the green letter A at the EXP module on the HOME page. Clicking the pair of UP-DOWN arrows of the CHAN No. on the right panel of the IN page will give you an option to select an input channel for the Expander configuration.

  • Page 13: Compressor

    BZBGEAR BG-A88M PRODUCT MANUAL ON/OFF SWITCH: Each band has a switch. When pressed, the EQ function in this band can be enabled or disabled. ACTIVE: Activates the EQ process. The function is equivalent to clicking the letter A on the EQ module on the HOME page.

  • Page 14: Auto Gain Control

    BZBGEAR BG-A88M PRODUCT MANUAL KNEE: The curve setting of the inflection point of the compressor, with a scale of [0.0, 20.0]. 0 indicates a hard knee; others indicate a soft knee. ATTACK: The time required by the compressor to begin the Compressor process once a signal is over the threshold, with a scale of [1, 500] ms.
  • Page 15 BZBGEAR BG-A88M PRODUCT MANUAL The following figure shows the setting page for the AGC module. TARGET LEVEL: The desired output signal level, with a scale of [-20.0, 0.0] dB. RATIO: The compression ratio of signals above the target level, with a scale of [1.0, 20.0].

  • Page 16: Auto Mixer

    BZBGEAR BG-A88M PRODUCT MANUAL Auto Mixer The AUTO MIXER is used to set the priority for MIC/linear inputs when 2 or more MIC/LINE ports are connected at once. As shown below, by clicking the AUTO MIXER section on the HOME page or the AUTOMIXER tab on the menu bar will open the AUTO MIXER settings.

  • Page 17: Adaptive Feedback Cancellation

    BZBGEAR BG-A88M PRODUCT MANUAL Adaptive Feedback Cancellation The Adaptive Feedback Cancellation (AFC, also known as Feedback Suppression) module can detect and suppress a frequency point of acoustic feedback. The AFC module allows you to detect and suppress frequency points of acoustic feedback for 8 bands. Parameters of this module are configurable.

  • Page 18: Adaptive Echo Cancellation

    BZBGEAR BG-A88M PRODUCT MANUAL Adaptive Echo Cancellation The 48kHz full-band Adaptive Echo Cancellation (AEC) algorithm is used to eliminate echoes coming from the far end in a video conference setting. As shown below, clicking the AEC module on the HOME page or the AEC tab on the menu bar will open the AEC configuration page.

  • Page 19: Adaptive Noise Suppression

    BZBGEAR BG-A88M PRODUCT MANUAL The figure below gives an example of configuring the matrix routing. Adaptive Noise Suppression The 48kHZ full-band Adaptive Noise Suppression (ANS) algorithm can effectively increase the signal to noise (S/N) ratio and suppress noises from appliances such as a fan or air conditioner.

  • Page 20: Matrix Mixer

    BZBGEAR BG-A88M PRODUCT MANUAL ACTIVE: Activates the ANS process. The function is equivalent to clicking the green letter A at the ANS module on the HOME page. Matrix Mixer The Matrix Mixer allows you to freely choose the audio route via matrixing.

  • Page 21: Output Settings

    BZBGEAR BG-A88M PRODUCT MANUAL Output Settings As shown below, clicking the OUTPUT module on the HOME page or the OUT tab on the menu bar will open the OUTPUT setting page. The figure below shows the details of the setting page.

  • Page 22: Two-Way Crossover

    BZBGEAR BG-A88M PRODUCT MANUAL Two-way Crossover The two-way crossover consists of a High Pass Filter and a Low Pass Filter which can divide the input signal 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, will open the configuration page.

  • Page 23: Delay

    BZBGEAR BG-A88M PRODUCT MANUAL Delay The Delay module is typically used to delay the output speed of audio signals which can be used to sync audio with a video. Clicking the DELAY module on the HOME page or the DLY button on the OUT page will open the configuration page for the Delay module.

  • Page 24: Limiter

    BZBGEAR BG-A88M PRODUCT MANUAL Limiter A Limiter can reduce the dynamic range of signals by limiting the maximum output level so as to ensure that the connected amplifier won’t be overloaded by high signal levels. Clicking the LIM module on the HOME page or the LIMITER button on the OUT page, will open the LIMITER configuration page.

  • Page 25: Scene Management

    BZBGEAR BG-A88M PRODUCT MANUAL Scene Management Up to 8 scenes can be configured in the audio processor. By clicking “Tools”> “Scene” on the menu bar, you will enter the setting page shown below. Load: When pressed, the scene saved in this processor will be exported.

  • Page 26: Serial Settings

    BZBGEAR BG-A88M PRODUCT MANUAL Serial Settings You can configure the RS-232 serial parameters by clicking “Tools” > “Serial” on the toolbar to enter its setting page as shown below. Baud Rate: 9600 by default, open to change. Reset: Clicking it to restore the system default settings.

  • Page 27: Gpio Setting

    BZBGEAR BG-A88M PRODUCT MANUAL GPIO Setting Up to 8 programmable GPIO functions are available to be set in this audio processor. By clicking “Tools”> “GPIO” on the menu bar, users will enter the setting page as shown below. Users can configure the GPIO function as needed and see details on the GPIO Setting page.

  • Page 28: Tcp/Ip Control Command

    PRODUCT MANUAL TCP/IP Control Command The BG-A88M supports TCP/IP command control. Connect the LAN port of the unit to a PC, then open a TCP/IP Command tool on the PC to send TCP/IP commands to control the device. The TCP/IP command list is shown below.
  • Page 29 BZBGEAR BG-A88M PRODUCT MANUAL 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). pry: Priority, pry=0~10，A larger value indicates a higher priority. Field ><: Level value of the auto mixer channel. The value range is [-100, 12]dB.
  • Page 30 BZBGEAR BG-A88M PRODUCT MANUAL 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"...
  • Page 31 BZBGEAR BG-A88M PRODUCT MANUAL HDly (Delay) <HDly></HDly> The delay module is mainly used to delay sound playing. no: Channel number, no=100~107. bypass: bypass or not，bypass="1" (signal bypass)，bypass="0" (not bypass). Field ><: Cut-off frequency. The value range is [0, 500]ms. <HDly no="104" bypass="0">300</HDly>...
  • Page 32 BZBGEAR BG-A88M PRODUCT MANUAL <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 -45dB, compression rate to 2, hard knee, attack time to 10ms, and release time to 100ms.
  • Page 33 BZBGEAR BG-A88M PRODUCT MANUAL 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.

  • Page 34: Rs-232 Control Command

    PRODUCT MANUAL RS-232 Control Command The BG-A88M supports RS-232 command control. Connect the RS-232 port of the product to a PC, then open a Serial Command tool on a PC to send ASCII commands to control the product. The ASCII command list is shown below.
  • Page 35 BZBGEAR BG-A88M PRODUCT MANUAL 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 x=1~8, is active and set attacktime 10! attacktime z! z=1~500 attacktime 10ms...
  • Page 36 BZBGEAR BG-A88M PRODUCT MANUAL Command Code Function Description Example Feedback Default Setting Set the agc rate, s in 1 agc on input 1 agc is s in x agc on x=1~8, z=10~200 rate z! rate 30! active and set rate...
  • Page 37 BZBGEAR BG-A88M PRODUCT MANUAL 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 Remove the input, x=1~8 afc remove 1 s afc remove 1!
  • Page 38 BZBGEAR BG-A88M PRODUCT MANUAL Command Code Function Description Example 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...

  • Page 39: Troubleshooting And Solutions

    BZBGEAR BG-A88M PRODUCT MANUAL Troubleshooting and Solutions If the output audio is abnormal, you may need to check following items: ● Is the STATUS LED normal? ● Is the INPUT/OUTPUT VOLUME turned down to the lowest level. ● Are the cables in the right ports? ●...

  • Page 40: Tech Support

    Copyright All the contents in this manual and its copyright are owned by BZBGEAR. No one is allowed to imitate, copy, or translate this manual without BZBGEAR’s permission. This manual contains no guarantee, standpoint expression or other implies in any form. Product specification and information in this manual is for reference only and subject to change...

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