Re: ALSA plugins

[Miroslav Skoric <skoric@uns.ac.rs>]

On 11/22/21 1:04 AM, Dan Ritter wrote:

> The dmix plugin is installed by default.
>
> $ aplay -L|grep dmix
> dmix:CARD=HDMI,DEV=3
> dmix:CARD=Generic,DEV=0
>
> The dsnoop plugin is installed by default:
> $ arecord -L|grep dsnoop
> dsnoop:CARD=Generic,DEV=0
> dsnoop:CARD=Generic,DEV=2
>
> You configure them either in your systemwide /etc/asoundrc, or
> your personal ~/.asoundrc

Thanks. Here is what I got before adding a secondary sound-card device:

ham@localhost:~$ aplay -L|grep dmix
dmix:CARD=Intel,DEV=0
ham@localhost:~$ arecord -L|grep dsnoop
dsnoop:CARD=Intel,DEV=0
ham@localhost:~$


... and here is what I got after adding the secondary sound-card device:

ham@localhost:~$ aplay -L|grep dmix
dmix:CARD=Intel,DEV=0
dmix:CARD=Audio,DEV=0
ham@localhost:~$ arecord -L|grep dsnoop
dsnoop:CARD=Intel,DEV=0
dsnoop:CARD=Audio,DEV=0
ham@localhost:~$


Btw, there was no ~/.asoundrc in personal directory, and also no 
/etc/asoundrc (either before or after attaching the second card). Each 
sound card works well on its own, running different amateur radio 
protocols. The plan is to make the second card 'sharing' its function in 
between the protocol (application) it uses now *and* another one 
protocol that shall be also sent to the same card. However, up to now 
that added protocol/application returns an error msg telling that either 
record or playback device is already busy or not accessible in that card.

And then someone suggested me to check for dmix and dsnoop, as those 
plugins shall overcome that 'application sharing' issue.

Any idea?

Misko