Getting Pulseaudio and alsa to share one sound card

[Mark Gaiser]

Can you use paplay instead?
That is the pulseaudio aplay drop-in replacement.
I'm guessing you won't have "device or resource busy" errors when using
paplay.

I did not test this! But do let us know if it works for you :)

On Tue, May 7, 2024 at 3:24 PM Richard Reina <gatorreina at gmail.com> wrote:

> I have a Raspberry Pi 3b with a Hifiberry Amp4/DAC hat runs Moode Audio OS.
>
> If I pick Pulse as they audio device in LedFx and play a sound file with aplay
> sound_file.wav my leds react to the music.
>
> The problem is that after aplay has finished playing the sound file if I
> then go try to use Moode audio player Moode audio won't play music and
> gives me the following error:
>
> MPD error Failed to open "ALSA Default" (alsa); Failed to open ALSA device
> "_audioout": Device or resource busy
>
> This persists until I stop Ledfx. Is there a way I can switch back and
> forth between aplay and Moode Audio player without having to stop and start
> Ledfx? I am not looking to get LedFx working with Moode I only want
> reactive lights when I play a song with aplay.
>
> $ aplay -l
>
> **** List of PLAYBACK Hardware Devices ****
>
> card 0: sndrpihifiberry [snd_rpi_hifiberry_dacplus], device 0: HiFiBerry
> DAC+ HiFi pcm512x-hifi-0 [HiFiBerry DAC+ HiFi pcm512x-hifi-0]
>
> Subdevices: 0/1
>
> Subdevice #0: subdevice #0
>
> $ amixer
> Simple mixer control 'Master',0
>   Capabilities: pvolume pswitch pswitch-joined
>   Playback channels: Front Left - Front Right
>   Limits: Playback 0 - 65536
>   Mono:
>   Front Left: Playback 65536 [100%] [on]
>   Front Right: Playback 65536 [100%] [on]
> Simple mixer control 'Capture',0
>   Capabilities: cvolume cswitch cswitch-joined
>   Capture channels: Front Left - Front Right
>   Limits: Capture 0 - 65536
>   Front Left: Capture 65536 [100%] [on]
>   Front Right: Capture 65536 [100%] [on]
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/pulseaudio-discuss/attachments/20240507/5cdbbde8/attachment.htm>