TinySine QCC bluetooth configuration problem

[audio_04]

I am writing to request technical assistance regarding a True Wireless Stereo (TWS) setup using two TSA7802B amplifier boards, (I bought them with Party Mode, but I modified the firmware downloading QCC_Tool).
The Issue: I have successfully paired both boards in TWS mode (they played the "beep", though I don't exactly know how to confirm they are paired). When they connect, the Slave board correctly plays the system "beep" through the connected transducer, ¿confirming the physical speaker connection is working?. However, when I stream music from my phone, the Master board plays audio perfectly, but the Slave board remains completely silent.

Troubleshooting steps already completed:

- Firmware: I flashed both boards with the official audioB i2s tws.xuv file via QCC_Tool.

- MAC Addresses: I modified the Bluetooth Address using QCC_Tool to ensure both boards have unique MAC addresses. They are not cloned.

- SigmaStudio: Both ADAU1701 DSPs are flashed with the default factory project provided on your website, and I have written it to the EEPROM.

- Hardware check: I swapped the physical speaker wires to the other output channels on the slave board, but it remains mute during music playback.

- ADK Configuration Tool: I checked the Channel Allocation settings. The Endpoint Hardware Type is correctly showing as I2S.

Since the Slave board plays the internal system beeps but drops the I2S music stream during TWS, it appears there is a routing or channel allocation issue between the QCC Bluetooth module and the DSP on the slave side.
Pd: the issue exists for both ways, it doesn't matter which of the two amplifiers is the Master and which is the Slave.

I also attempted to flash the Party Mode .xuv file, but the board still boots with 2 LED flashes instead of 3, indicating the core firmware has not changed or the .xuv file is mismatched.

 

[antcollinet]

I am writing to request technical assistance

I think it is unlikely you will find anyone here with sufficient tech knowhow of those specific boards and firmwares to help you. You probably need to address your question to the manufacturer/supplier. Even better if they have a user to user support forum.

Please provide the complete factory flash files and instructions to restore the boards.

No-one here is going to be able to do that.


I hope you get the help you need to get it fixed.

 

[MrBill]

If you find an answer please post it. I've wasted 12 hours today trying to get these things to talk. I've used adau1701s extensively in the past and have a 1467 in my living room stereo, so I am very comfortable with that part.

If I flash them with party mode they both play, but the master cannot manage and keeps skipping. With the TWS firmware either board plays fine if I am paired to it. When I go into TWS mode the boards both do the beeps, but after the solid blue lights lock in I never hear anything from the slave. Very frustrating to waste an entire day of my life and have nothing to show for it

Edit - my boards are the tas8800b if that matters.

 

[MrBill]

I did take a moment to pull out the logic analyzer and tap the pins in question. On the master I have a 48Khz lrck, 3Mhz bck and the data looks how I would expect.

On the slave I have a 48Khz lrck, 3Mhz bck, and the sd line is pegged at 0. I wanted to rule out an "it only sends L or R" issue. Nope. There is no data even being attempted on SD.

edit: I'm hungry. mixed up my Hz's

 

[audio_04]

If you find an answer please post it. I've wasted 12 hours today trying to get these things to talk. I've used adau1701s extensively in the past and have a 1467 in my living room stereo, so I am very comfortable with that part.

If I flash them with party mode they both play, but the master cannot manage and keeps skipping. With the TWS firmware either board plays fine if I am paired to it. When I go into TWS mode the boards both do the beeps, but after the solid blue lights lock in I never hear anything from the slave. Very frustrating to waste an entire day of my life and have nothing to show for it

Edit - my boards are the tas8800b if that matters.

I finally found the problem—it was simpler than I thought. I just needed to connect the antenna to both chips.

 

[MrBill]

I finally found the problem—it was simpler than I thought. I just needed to connect the antenna to both chips.

Congratulations on finding a fix! I already have an antenna on both

 

[audio_04]

Congratulations on finding a fix! I already have an antenna on both

For my experience, TinySine’s technical support has been quite good. They were able to help me. I had to send them a video and everything so they could identify that I hadn’t connected the antenna. Before that, they also sent me a specific firmware to try and do the "burn" process with it.

On the other hand, I would recommend (although I don’t think this is the actual issue) checking whether anything has changed in SigmaStudio for the ADAU1701. It might be worth re-downloading the default setup just in case.

 

[Mark185]

Agree with @audio_04 It is possible for the EEPROM to get corrupted and redowloading will fix that. Just make sure you know how to write to EEPROM. That is a separate step from Link/Compile/Download in Sigma Studio.