2 x 30W Bluetooth+USB sound card+DSP Audio Amplifier Board - TSA3121

TSA3121 is a 2x30W Stereo Bluetooth 5.0 digital audio amplifier board. It has a digital Input, Closed-Loop Class-D Amplifier chip TSA5756M and each channel has maximum 30W power output. Both of channels are capable of outputting nominal power simultaneously and continuously. This board can be powered by any DC12V-24V power supply. it can be used to drive any 4Ω or 8Ω passive speakers.

It's a 2 channels amplifier board. You can pair it with a mobile phone or a computer (etc). Power the amplifier board. Use your phone or PC (etc) to search for a new Bluetooth device. The module will appear as "TSA3121". You don't need a PIN, pair it and then you can play music.

The highlight point is ADAU1701 DSP chip on board. It has a default DSP program loaded. Customers can adjust the gain, bass, midrange and treble in the DSP program. It also has a debug port for Sigima Studio, and user can program this module with our USBi programmer to get more functions that include equalization, crossover, bass enhancement, multiband dynamics processing, delay compensation, etc. TSA3121 supports  Apt-X and TWS. Therefore, Users can stream audio to 2 paired amplifier boards at the same time wirelessly. You can also connect multiple boards together wirelessly if you select party mode firmware.

TSA3121 has a USB C port on the board. It will becomes a USB sound card if you connect it to your PC.

One button pairing port:

Please read this tutorial to understand what is one button pairing. Here is the RGB push button link.

 

External Button port:

You can connect our Panel Mount Buttons Kit for Amplifier to TSA3121's external buttons port, it works same as buttons on the board.

 

Volume control POT port:

There is an Ext POT port on the board. You can connect external POTs (5K~20K) to control the Main volume,treble,middle and Bass. You need to update the DSP program first. DSP program (with external POTs). This is our POT kit

1. ADC0- Main volume.
2. ADC1- Bass volume.
3. ADC2- Middle volume.
4. ADC3- treble volume.

 

DSP programming port:

User can load a new DSP program by using the USBi JTAG Sigma DSP programmer.

 

How to use:

TWS firmware (single board)

1. Power up TSA3121, red LED slow blink then red and blue LED flash alternately.
2. Now, your smartphone will be able to find a new Bluetooth device which name is "TSA3121", connect it. Blue LED flash.
3. You can play the music now.

 

 

One board works like a normal Bluetooth amplifier

 

TWS connection (2 boards can connected together)

• S1 - Long press 3s into pairing mode. Long press 6s clear the pairing info.
• S1+S2 - Long press 1s into TWS slave mode.
• S1+S3 - Long press 1s into TWS master mode.
• S2+S3 - Long press 1s disconnect TWS connection.

 

• Master board

1. Power up TSA3121, red LED slow blink then red and blue LED flash alternately.
2. Now, your smartphone will be able to find a new Bluetooth device which name is "TSA3121", connect it. Blue LED flash.
3. You can play the music now. If you only use one amplifier board, you don't need do the following steps.
4. Long press S1+S3 button for 1 second, board into TWS master mode. Red and blue LED flash alternately.

 

• Slave board

1. Power up another TSA3121, red LED slow blink then red and blue LED flash alternately.
2. Long press S1+S2 button for 1 second, board into TWS slave mode. Red and blue LED flash alternately.
3. The master board will auto searching (30 seconds) slave board. Both master and slave board will be connected.
4. The slave board will have music out now.
5. If you want to disconnect TWS connection, long press S2+S3 button for 1 second to disconnect TWS connection.

 

 

 

Party firmware (single board)

1. Power up TSA3121, blue LED flash 3 times per cycle.
2. Double click S3 button, TSA3121 into pairing mode. (Voice: Pairing, blue LED flash 2 times per cycle.)
3. Now, your smartphone will be able to find a new Bluetooth device which name is "TSA3121", connect it. (Voice: Pairing successful, blue LED flash 1 time per cycle.)
4. You can play the music now.

 

Party connection (multi boards can connected together)

• Transmitter board

1. Power up TSA3121, blue LED flash 3 times per cycle.
2. Double click S3 button, TSA3121 into pairing mode. (Voice: Pairing, blue LED flash 2 times per cycle.)
3. Now, your smartphone will be able to find a new Bluetooth device which name is "TSA3121", connect it. (Voice: Pairing successful, blue LED flash 1 time per cycle.)
4. You can play the music now. If you only use one amplifier board. You don't need do the following steps.
5. Press S2 button, board into transmitter mode.(Voice: Broadcast mode)

 

• Receiver board

1. Power up another TSA3121, blue LED flash 3 times per cycle.
2. Press S3 button, board into receiver mode.(Voice: Broadcast audio enabled)
3. Double click S2 button on transmitter board, double click S3 button on receiver board, the transmitter board will auto searching (30 seconds) receiver board. Both transmitter and receiver board will be connected.
4. The receiver board will have music out now.
5. If a new TSA3121 want to join as receiver board, repeat step1~step3 on the new TSA3121 board.
6. If a receiver board wants to quit, click S2 button on that board to set it into transmitter mode.

 

Note: If you don't hear the voice prompt when clicking TX, please click the RX to switch the mode and then click TX again.

 

 

 

 

Features:

• Size: 105*75*20mm
• Multipoint connection
• Bluetooth 5.1
• Up to 100 boards can be linked together.
• Qualcomm cVc audio technology
• Qualcomm TrueWireless Technology
• Stereo receive
• Effective transmission distance: 50-100m
• Compatible with all Bluetooth devices that support media audio, including iPhone

 

Documents:

• How to change the BT name
• How to pair and set TWS mode
• ADI SigmaStudio software
• How to write DSP program to DSP board
• Default DSP program
• DSP program (with external POTs)
• Bluetooth Firmware(TWS)
• Bluetooth Firmware(Party mode)
• How to burn the Bluetooth firmware
• TWS pairing video tutorial
• Party mode pairing video tutorial

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