[AudioI] dtparam=audio=on ?

[Ron Patton]

Hi Matt,

Yes I can play audio through the headset (via VLC) while simultaneously running my application that uses card 2 and card 3 (as listed below). Read on if you want a brief background of the application.

The application is a SDR Radio application. Using the facilities of PortAudio, the applications accesses a SDR transceiver via card 2 (Proficio), then using DSP and PortAudio magic, sends audio to card 3 (the AudioInjector Zero). This is for receive (what you listen to). It does the same thing for transmit audio, only in reverse.

Now that the headset works, I can have the system sounds (beeps, bops and such) go to the headset connector. That will have a small speaker (mounted in the SDR radio enclosure) attached to it.

73,
Ron / W4MMP

On 10/29/2021 19:04, Matt Flax wrote:

> Great!
>
> Do they all work ? Also out of interest, can you play from the headphone jack on the pi at the same time that you can use the AI stereo card ?
>
> On 29/10/21 10:28 pm, Ron Patton wrote:
>
>> 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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