[pulseaudio-discuss] Why should we set multichannel-input and multichannel-output to a fallback map

[Chengyi Zhao]

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
-


Best Regards,
Chengyi