[Alsa-user] Fwd: Help on specifying 'chmap' in asound.conf

Dear all, I am having a question regarding how to specify 'champ' for a plugin. I do not see any examples of this. I tried many ways to specify but failed. As indicated by the link below, I can specify the MAP as a string array. Can someone provide one example on how exactly this[ch

[Alsa-user] Number of PCM instance (pcm device file) for one sound card

Dear all , The tutorial below states that ""Each card device can have up to four pcm instances" https://www.kernel.org/doc/html/v4.19/sound/kernel-api/writing-an-alsa-driver.html#pcm-interface

[Alsa-user] How to check ALSA version in Linux kernel

> > Dear all, > I am involved in a project which will use different kernel versions along the way, first 4.14, 4.19, 5.3 etc. How can I know the differences in ALSA, besides comparing files ? How to get the ALSA version in Linux kernel ? Thanks a lot, Xinhui, ___