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Can't get sound in to work

Merijn de Klerk

June 02, 2023 10:03

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I'm trying to use the hifiberry ADC pro to stream audio with a raspberry pi 4.

I'm using Ubuntu 22.04.2 LTS.

I used the unix 4.x kernel guide to setup the config.txt in /boot/firmware/config.txt:

#added and removed lines:

#dtparam=audio=on
#dtoverlay=vc4-fkms-v3d,audio=off
dtoverlay=vc4-kms-v3d,noaudio
dtoverlay=hifiberry-dacplusadcpro
force_eeprom_read=0

(tried with fkms off, kms off and without either of them).

aplay -l will return the correct card (I think?):

**** List of PLAYBACK Hardware Devices ****

card 0: sndrpihifiberry [snd_rpi_hifiberry_dacplusadcpro], device 0: HiFiBerry DAC+ADC Pro HiFi multicodec-0 [HiFiBerry DAC+ADC Pro HiFi multicodec-0]
Subdevices: 1/1
Subdevice #0: subdevice #0

Now the problem is that there is no audio when I start a stream with darkice, or try to record with arecord -d 10 -r 48000 -c 2 -f S16_LE

I'm sure I'm inserting audio into the card using the analogue input, phone jack 3.5 mm. But the audio recording is completely silent.

Now I was hoping anyone could point me to some things I could try, because I'm not sure what to do next.

 

Thanks in advance!

 

 

 

 

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5 comments

• 1
  
  HiFiBerry team June 02, 2023 12:27

  First: Do you have problems with playback or recording? From what I see you only tried recording - right? In this case: Does playback work?

   

• 0
  
  Merijn de Klerk June 02, 2023 14:37

  Playback using 2 the analog outputs works fine with mplayer. So the problem is only with recording.

• 0
  
  HiFiBerry team June 05, 2023 05:41

  Ok, what is connected to the analog input and what exectly do you do to record audio?

• 0
  
  Merijn de Klerk October 02, 2023 14:11

  Sorry for the very late response, but:

  I run some random audio (Radio) from an audio mixer into the hifiberry card. I try to record this using the following command:
  arecord -D plughw:0,0 --duration=20 audio.wav

  Audio.wav has no audio:

  
  

• 0
  
  HiFiBerry team October 03, 2023 05:31

  Don't use plughw! It'll try to use the correct sample rate, but will just delivere nothing if it can't. Use the hw device directly. This will probably give you an error message as you haven't defined sample rate and channels (must be 2).