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

Thu Sep 23 19:16:43 CEST 2021

Thanks to everybody for your suggestions!

I just found something on YouTube about running one of those cards.

All I needed to do was adding this line to /boot/config.txt

dtoverlay=hifiberry-dacplus

(I had already commented out the onboard soundcard . . . )

Finally it shows up as a alsa sound device as it should.

Not sure if this one is the best choice - I'm still waiting for an answer from the manufacturer.

Now I can keep moving on with my sound module!

The hardware is working as expected or even better.

(Still discovered a kernel compilation omission, though . . . )

Cheers :)

Ingo

From: Pd-list [mailto:pd-list-bounces at lists.iem.at] On Behalf Of Antoine Rousseau
Sent: Thursday, September 23, 2021 5:57 PM
To: Pd-list
Subject: Re: [PD] How to use a DAC expansion board with the RPi4

hi,

maybe these tutos, about configuring an I2S sound card on a Pi, can help you:

https://learn.pimoroni.com/article/raspberry-pi-phat-dac-install

https://learn.adafruit.com/adafruit-i2s-audio-bonnet-for-raspberry-pi/raspberry-pi-usage

Not sure their pre-configurated scripts will work with your hardware, but maybe they will after all.

Le jeu. 23 sept. 2021 à 17:01, Alexandros <adrcki at gmail.com <mailto:adrcki at gmail.com> > a écrit :

It does appear as a sound card and you can connect to it as a MIDI 
device via aconnect.

On 23/9/21 5:28 μ.μ., Ingo wrote:
> 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 <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 <mailto: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 <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 <mailto:pd-list at lists.iem.at> 
>>>> Subject: Re: [PD] How to use a DAC expansion board with the RPi4
>>>>
>>>> * Ingo <ingo at miamiwave.com <mailto: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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