[AudioI] dtparam=audio=on ?

[Ron Patton]

Hi Matt,

Thanks. As it turns out the problem I was experiencing was caused by a bug in my application. The application was not parsing the list of audio devices correctly.

But for completeness sake here is what aplay -l lists for audio devices on a RPi 4B when dtparam=audio=on is included in the config.txt :

**** List of PLAYBACK Hardware Devices ****
card 0: b1 [bcm2835 HDMI 1], device 0: bcm2835 HDMI 1 [bcm2835 HDMI 1]
Subdevices: 4/4
Subdevice #0: subdevice #0
Subdevice #1: subdevice #1
Subdevice #2: subdevice #2
Subdevice #3: subdevice #3
card 1: Headphones [bcm2835 Headphones], device 0: bcm2835 Headphones [bcm2835 Headphones]
Subdevices: 4/4
Subdevice #0: subdevice #0
Subdevice #1: subdevice #1
Subdevice #2: subdevice #2
Subdevice #3: subdevice #3
card 2: Proficio [Proficio], device 0: USB Audio [USB Audio]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 3: audioinjectorpi [audioinjector-pi-soundcard], device 0: AudioInjector audio wm8731-hifi-0 [AudioInjector audio wm8731-hifi-0]
Subdevices: 0/1
Subdevice #0: subdevice #0

Notice there are two RPi on board devices. HDMI 1 and Headphones

73,
Ron / W4MMP

On 10/28/2021 18:33, Matt Flax wrote:

> Hi Ron,
>
> You can use the HDMI output at the same time as an Audio Injector soundcard. Here is a reference on how to do that :
>
> https://lists.audioinjector.net/pipermail/people/2020-March/000021.html
>
> I believe that the built in headphone jack on the Pi shares the same I2S bus or DMA bus and for that reason you can't use the headphone jack and an I2S soundcard at the same time. Having said that - if someone can prove me wrong, it would be wonderful !
>
> Matt
>
> On 28/10/21 2:57 am, Ron Patton via People wrote:
>
>> Hi,
>>
>> I would like to know why I can't have both dtparam=audio=on and dtoverlay=audioinjector-wm8731-audio in the config.txt for the RPi? I would like to use the RPi onboard output sound device and the AudioInjector device.
>>
>> --
>> 73,
>> Ron / W4MMP
>
> --
> Checkout the community email list :
> https://lists.audioinjector.net/mailman/listinfo/people
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