0

Dac + Pro bias voltage

Grant Smith

March 13, 2021 17:27

None

Follow

Hi

I m using this soundcard with a Pi Zero and Arch with an uptodate kernel.

Following the datasheet I did:

dtoverlay=hifiberry-dacplusadcpro

The card is recognized. To enable bias voltage (software side) I do:

amixer sset "ADC Mic Bias" "Mic Bias off"

This gives:

amixer: Unable to find simple control 'ADC Mic Bias',0

Thoughts on why, and how to proceed would be great.

Thank you,

Grant

• Facebook
• Twitter
• LinkedIn

3 comments

• 0
  
  Grant Smith March 13, 2021 18:15

  I need to list the card number (and put 'on' !) eg:

  amixer sset "ADC Mic Bias" "Mic Bias on" -c 1

   

• 0
  
  Grant Smith March 14, 2021 00:24

  After quite a lot of trying things with this, could anybody confirm if the drivers for this card are included in the Arch Linux kernel for the Pi Zero?

  Thanks

  Grant

• 0
  
  Grant Smith March 14, 2021 00:26

  I'm wondering, because I haven't been able to get any sound out of the device...