[PD] How to use a DAC expansion board with the RPi4

[Peter P.]

* Ingo <ingo at miamiwave.com> [2021-09-23 15:35]:
> cat /proc/asound/cards	says	--- no soundcards ---
> Pd doesn't see any soundcards.
> 
> I think the problem is that the DAC get its data from the GPIO pins that Pd
> cannot communicate with.
I would ask the manufacturers of this
https://www.berrybase.de/en/new/argon-nanosound-one-case-f-252-r-raspberry-pi-4?c=2389
how their sound card can be accessed or if specific drivers (called
"Modules" in linux) have to be loaded.
 
> I wonder if anybody made a "virtual soundcard" that talks to the RPi GPIO
> and shows up as a ALSA device.
This would be so complicated that I don't expect the manufacturers to
force you to do this.