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[Solved] Amp2 Hybrid Flow dump to work as Mono amp

Jeremy

March 10, 2018 07:14

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Hi everyone,

I just bought Hifiberry Amp 2 board (still in transit)

I made some research concerning the main component of the board (TAS5756M from texas instrument) and I found in its datasheet that this component is able to work in mono operation (exactly in PBTL , ie parallel bridge tied load)

Does anyone already try to dump the register via Pure Path GUI from TI on his Amp2 to work as mono amp ?

Last question is for hifiberry team : what is the initial hybrid flow configuration of the AMP2 board ? The .cfg file could be available ?

 

Thanks a lot for your answers

Jeremy

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3 comments

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  HiFiBerry team March 10, 2018 08:03

  Hi,

  there isn't any hybrid flow used. The problem with DSP programs is that you would need a separate program for each sample rate the Amp2 supports as the DSP does not feature a sample rate converter. Therefore, there is no support for the DSP features for this chip at all and we do not plan to implement this. 

  If you want to use the Amp2 in mono mode, you have to to this on ALSA level, e.g. like this:
  https://support.hifiberry.com/hc/en-us/community/posts/201494532-Use-of-ALSA

  Note that PBTL mode isn't supported!

  Best regards,
  Daniel

• 0
  
  Jeremy May 16, 2018 15:13

   In fact, a simple tweak on the board hardware allow the board to work in PBTL (but the stereo mode became no more supported)

  Thanks to TI support team :

  http://e2e.ti.com/support/amplifiers/audio_amplifiers/f/6/t/670681

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  Mattias January 15, 2020 19:59

  Jeremy: Would love to know if you had any success with your attempt. I've read up on the thread that you link to, but it feels like I'm missing a few things - would you be able to provide a list of the steps you concluded to get it running in PBTL?

  Edited by Mattias January 15, 2020 20:13