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Use RF remote for DAC+ DSP on OSMC

joriyann

March 05, 2023 20:51

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Hi, 

I have installed a Hifiberry DAC+ DSP on a Raspberry 4 running OSMC. I also installed the dsptoolkit and i can control the volume through amixer or alsamixer.

I would like to control the hardware volume with a rf remote (not the hifiberry one). I plan to unmap the volume keys from Kodi and use the remote control amixer instead. I know I will lose the software volume control from tools like Yatse :)

My goal is to connect my TV Toslink output to the board input and control both Kodi and TV volume from a remote.

I looked for asound configuration files in a HifiberryOs installation to copy but i found severals files and I don't know what does what :) I'm not a Linux specialist so reading asound files is quite a challenge.

Is there a simple way to map the remote volume keys directly to the Hifiberry card outside of HifiberryOS ?

I found some exemples but I'm not sure if they are OK. They didn't work when I tried them :

pcm.volume {
    type hw
    card 0
}

ctl.volume {
    type hw
    card 0
}

pcm.!default {
    type plug
    slave.pcm "volume"
}

ctl.!default {
    type hw
    card 0
}

Thanks for any response !

Cheers, Yannick !

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6 comments

• 0
  
  HiFiBerry team March 06, 2023 05:53

  In HiFiBerryOS, we use our own software to map keys to volume control. There might be something similar available for OSMC. Check the add-on repository. Maybe you can find something. If you can't find somehthing, it's probaby best to ask in the OSMC forum, maybe user users know if something like this exists.

• 0
  
  joriyann March 07, 2023 19:53

  Hi, thanks for the reply !

  What is the software you are talking about ? audiocontrol ?

  How do you map ? With udev ?

  I'm sorry if the questions doesn't make sense, i'm trying to gather everything I know.

  Cheers !

• 0
  
  HiFiBerry team March 07, 2023 19:56

  Yes, it's audiocontrol. Mapping is handled in the audiocontrol configuration file. Documentation and soure can be found on Github:

  https://github.com/hifiberry/audiocontrol2/tree/master/doc

  However, I'm not sure if it's a good idea to use this with OSMC.

• 0
  
  joriyann March 07, 2023 20:04

  I'm not sure either 🙂 But I will look for learning purposes. Maybe I will investigate the OSMC part with a existing add-on or coding one. The code in audiocontrol can help me understand and see what can be done in OSMC.
  Thanks again!

• 0
  
  joriyann March 07, 2023 20:06

  Do you think it's possible to run Kodi (noy OSMC) inside HifiberryOs via docker? I think i've seen some post about it and it was not recommended.

• 0
  
  HiFiBerry team March 08, 2023 05:20

  Possible? Maybe. I haven't seen somebody doing it, but it might be worth a try. I would recommend at least a 2GB, better 4GB version of the Pi for this.