Re: ALSA plugins
On Jo, 25 nov 21, 15:28:45, Miroslav Skoric wrote: > > And then someone suggested me to check for dmix and dsnoop, as those plugins > shall overcome that 'application sharing' issue. As far as I recall the dmix plugin (don't know about dsnoop) has some limitations on sampling rates it can work with, which will result in resampling in case your card doesn't support that exact sampling rate. This may or may not be important for your application. Kind regards, Andrei -- http://wiki.debian.org/FAQsFromDebianUser signature.asc Description: PGP signature
Re: ALSA plugins
Miroslav Skoric wrote: > On 11/22/21 1:04 AM, Dan Ritter wrote: > > ... 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:~$ That's good. > 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. Next you need to tell your applications to use the dmix devices instead of their defaults. This is application-specific; read the manual and look for "ALSA device". -dsr-
Re: ALSA plugins
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
Re: ALSA plugins
On 11/21/21 9:33 PM, Georgi Naplatanov wrote: On 11/21/21 20:57, Miroslav Skoric wrote: Hi all, I was recently told that ALSA doesn't normally allow sharing a soundcard with two applications, but there are two ALSA plugins, dsnoop and dmix to share capture and playback respectively. I spent some time in searching the web for possible info on how to install or how to check if those plugins are installed, but did not find instructions. Any pointer in that direction? Thanks in advance. Why don't you use PulseAudio or maybe PipeWire? Kind regards Georgi My issue is related to some amateur radio applications, and the application maintainer suggested me to check with ALSA plugins first. It should be possible to try PulseAudio as an alternative method but I wait for instructions from hams who made it working. Thanks anyway, Misko
Re: ALSA plugins
Miroslav Skoric wrote: > Hi all, > > I was recently told that ALSA doesn't normally allow sharing a soundcard > with two applications, but there are two ALSA plugins, dsnoop and dmix to > share capture and playback respectively. I spent some time in searching the > web for possible info on how to install or how to check if those plugins are > installed, but did not find instructions. Any pointer in that direction? 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 -dsr-
Re: ALSA plugins
On 11/21/21 20:57, Miroslav Skoric wrote: > Hi all, > > I was recently told that ALSA doesn't normally allow sharing a soundcard > with two applications, but there are two ALSA plugins, dsnoop and dmix > to share capture and playback respectively. I spent some time in > searching the web for possible info on how to install or how to check if > those plugins are installed, but did not find instructions. Any pointer > in that direction? Thanks in advance. > Why don't you use PulseAudio or maybe PipeWire? Kind regards Georgi
ALSA plugins
Hi all, I was recently told that ALSA doesn't normally allow sharing a soundcard with two applications, but there are two ALSA plugins, dsnoop and dmix to share capture and playback respectively. I spent some time in searching the web for possible info on how to install or how to check if those plugins are installed, but did not find instructions. Any pointer in that direction? Thanks in advance. Misko
