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

[Ingo]

The PiSound looks great but would require a different housing. Mmmmhhh . . .
How does Pd communicate with it?
Does it show up as a sound card and MIDI device?



> -----Original Message-----
> From: Pd-list [mailto:pd-list-bounces at lists.iem.at] On Behalf Of Alexandros
> Sent: Thursday, September 23, 2021 3:53 PM
> To: pd-list at lists.iem.at
> Subject: Re: [PD] How to use a DAC expansion board with the RPi4
>
> I can confirm that the Pisound works great, but it's not a cheap solution.
>
> On 23/9/21 4:34  . ., Ingo wrote:
> > 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 wonder if anybody made a "virtual soundcard" that talks to the RPi
> > GPIO and shows up as a ALSA device.
> >
> > I have a very small Sounblaster card that works fine and sounds ok but
> > it's still too large to fit inside.
> > With the internal headphones out my software doesn't even start up.
> >
> > I'm afraid that this won't even work at all with Pd . . .
> > Has anyone ever used any of these RPi DACs?
> >
> > Ingo
> >
> >
> >
> >> -----Original Message-----
> >> From: Pd-list [mailto:pd-list-bounces at lists.iem.at] On Behalf Of Peter P.
> >> Sent: Thursday, September 23, 2021 2:19 PM
> >> To: pd-list at lists.iem.at
> >> Subject: Re: [PD] How to use a DAC expansion board with the RPi4
> >>
> >> * Ingo <ingo at miamiwave.com> [2021-09-23 14:04]:
> >>> Hi everybody!
> >>>
> >>>
> >>>
> >>> I just got a DAC expansion board for my RPi4 but Pd doesn't see it.
> >>>
> >>> https://www.berrybase.de/en/new/argon-nanosound-one-case-f-252-
> r-
> >> raspb
> >>> erry-p
> >>> i-4?c=2389
> >>>
> >>>
> >>>
> >>> Since there is no room for a sound card in such a small box and the
> >>> RPi headphone out is no good it looks like the only compact way.
> >>>
> >>>
> >>>
> >>> Can anybody point me to instruction for making Pd use these DAC
> >>> expansion boards as a sound card?
> >> What do the commands
> >> $ pd -listdev
> >> $ $ cat /proc/asound/cards
> >> tell you about available cards?
> >>
> >> What does the manufacturer of the expansion board tell you about it?
> >> Will it be a separate sound card from the built-in one? Or will the
> > expansion
> >> merely provide the built-in one with more channels?
> >>
> >> You might want to subscribe to the linux audio users mailing list for
> > assistance
> >> as well.
> >>
> >> P
> >>
> >>
> >>
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> >
> >
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