On Tue, 16 Jul 2024 08:09:21 +0200,
Xinhui Zhou wrote:
>
> 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 [chmap
> MAP] can be specified?
>
> "
> pcm.name {
> type cras
> [chmap MAP] # Provide channel maps; MAP is a string array
> }
> "
> https://www.alsa-project.org/alsa-doc/alsa-lib/pcm_plugins.html
>
>
> I can something like these, but none of these work for me.
>
> chmap LFE
> chmap "LFE"
> chmap FR,FL,LFE
> champ "FR,FL,LFE"
You need to define a composite array, e.g. pass like
chmap [ "FL,FR" ]
instead.
For multiple configurations, you can put more items such as
chmap [ "FC" "FL,FR" "FL,FR,FC,LFE" ]
HTH,
Takashi
