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Digi+ I/O output limited to 48Khz regardless of player

Stefan Brunthaler

April 19, 2025 13:30

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Hi

I use a Raspi 5 with Digi+ I/O hat. The SP/DIF output is connected to a Cambridge Audio DACMGIC200M. My OS is

Linux sbraspi 6.12.20+rpt-rpi-2712 #1 SMP PREEMPT Debian 1:6.12.20-1+rpt1~bpo12+1 (2025-03-19) aarch64 GNU/Linux

It looks as if (regardless which music player I use) the output is limited to 48Khz. I tried mplayer with a 24bit/192Khz FLAC encoded file as well as with a simple MP3 file. Chrome and Firefox give the same result, using the player.qobuz.com and other websites with 24/192 streams: Always limited to 48Khz.

Is there any setting for the driver I missed? aplay says:

**** List of PLAYBACK Hardware Devices ****
card 0: sndrpihifiberry [snd_rpi_hifiberry_digi], device 0: HifiBerry Digi HiFi wm8804-spdif-0 [HifiBerry Digi HiFi wm8804-spdif-0]
  Subdevices: 0/1
  Subdevice #0: subdevice #0

 

Thank you and happy Easter!

Regards Stefan B.

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3 comments

• 0
  
  HiFiBerry team April 20, 2025 05:01

  The driver ha nothing to do with it. It's the application that's requesting the sample rate.

  A web browser is definitely not the best way to test this. If you're sure you're application request 192kHz, check that you don't have any middleware running that resamples. Pipewire or Pulseaudio are music servers that usually do this.

• 0
  
  Stefan Brunthaler April 21, 2025 14:22

  Thank you for your answer.

  I also tried to use mplayer with a FLAC file, and mplayer says "192000Hz" but only 48Khz are detected by the DAC. No other firmware ist in use, as far as I can see.

  Any mire hints?

  Thanks and regards,

  Stefan B.

• 0
  
  HiFiBerry team April 21, 2025 16:09

  See above: You probably have Pipewire or Pulseaudio running and resampling.