On 2021/4/3 上午3:48, Tanu Kaskinen wrote:
On Fri, 2021-04-02 at 17:49 +0800, Chengyi Zhao wrote:
Hi guys,
I don't know why we should set multichannel-input and
multichannel-output to fallback map
in the configuration file default.conf.
I think these have no actual usage scenarios, we should delete these
configurations.
Do you agree with me？
----------------
./src/modules/alsa/mixer/profile-sets/default.conf：
-[Mapping multichannel-output]
-device-strings = hw:%f
-channel-map = left,right,rear-left,rear-right
-exact-channels = false
-fallback = yes
-priority = 1
-direction = output
-
-[Mapping multichannel-input]
-device-strings = hw:%f
-channel-map = left,right,rear-left,rear-right
-exact-channels = false
-fallback = yes
-priority = 1
-direction = input
-
These are used with sound cards that can't be opened with the regular
mappings. Some pro audio cards can have e.g. 12 channels and refuse to
be opened with any less channels. The "exact-channels" option is set to
false with the multichannel mappings, which means that no matter how
many channels the card requires, these mappings successfully open the
device.
I think there are two issue about these configurations:
1. If the sound card has two channels, this multichannel mapping
may be mapped.
2. Because there is no paths-output and paths-input items,
multichannel ports will not be added.
Thanks,
Chengyi
_______________________________________________
pulseaudio-discuss mailing list
pulseaudio-discuss@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
