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.

 

One board works like a normal Bluetooth amplifier

 

How to use:

TWS firmware (single board)

1. Power up TSA3121 and wait for 5 seconds. The board will enter pairing mode, and the red and green LEDs will flash alternately.
2. Now turn on your phone's Bluetooth, find a Bluetooth device named "TSA3121", and connect to it. Once connected, the red LED stays solid.
3. You can play the music now.

TWS connection (2 boards can connected together)

The S4 Button is equivalent to the external RGB push button.

 

• Master board

1. Power up TSA3121 and wait for 5 seconds. The board will enter pairing mode, and the red and green LEDs will flash alternately.
2. Now turn on your phone's Bluetooth, find a Bluetooth device named "TSA3121", and connect to it. Once connected, the red LED stays solid.
3. You can play the music now.
4. Pause the music, press and hold button S4 for about 2 seconds, you will hear two beep sounds, and the green LED will start flashing.

 

• Slave board

1. Power up the other TSA3121 and wait for 5 second, the red and green LEDs will flash alternately.
2. Press and hold button S4 for about 2 seconds, you will hear two beep sounds.
3. After a moment, when the master and slave are successfully paired, the green LEDs on both the master and slave will stay solid.
4. Master board and slave board can play music now.

 

Party firmware (single board)

1. Power up TSA3121, blue LED flash 3 times per cycle, accompanied by voice prompts for current mode: transmitter mode(red LED ON) or receiver mode(green LED ON).
2. Double click S4 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, accompanied by voice prompts for current mode: transmitter mode(red LED ON) or receiver mode(green LED ON).
2. Double click S4 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. If red LED ON, board is in transmitter mode, no need to operate step 5.
5. If green LED ON, click S4 button, board into transmitter mode.(Voice: transmitter mode, red LED ON)

 

• Receiver board

1. Power up TSA3121, blue LED flash 3 times per cycle, accompanied by voice prompts for current mode: transmitter mode(red LED ON) or receiver mode(green LED ON).
2. If green LED ON, board is in receiver mode, no need to operate step 3.
3. If red LED ON, click S4 button, board into receiver mode.(Voice: receiver mode, green LED ON)
4. Long press S4 button on transmitter board, long press S4 button on receiver board, the transmitter board will auto searching (30 seconds) receiver board. (Voice: searching)
5. Both transmitter and receiver board will be connected. (Voice: pairing successful)
6. The receiver board will have music out now.
7. If a new TSA3121 want to join as receiver board, repeat step1~step4 on the new TSA3121 board.
8. If a receiver board wants to quit, click S4 button on that board to set it into transmitter mode.

 

Note: If you don't hear the voice prompt when clicking S4 button, please click the S4 to switch the mode and then click S4 again.

 

 

 

 

Features:

• Size: 105*75*20mm
• Bluetooth 5.1
• I2S Sampling Rate: 48KHz
• Wide-range 12-V to 24-V Supply Voltage Operation
• TWS firmware: aptX, aptX-HD, SBC and AAC
• Party mode firmware: SBC
• 2 channels
• ADAU DSP integrated
• TWS or Multi-point connection
• Up to 100 boards can be linked together.(Party firmware)
• Effective transmission distance: 80-100m
• Compatible with all Bluetooth devices that support media audio, including iPhone
• Over/under voltage protection
• Over current protection
• Over temperature protection

 

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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