[alsa-devel] About 'SNDRV_PCM_CLASS_MULTI' for devices with multi-channels

Takashi Sakamoto mocchi.sakamoto113 at gmail.com
Wed Feb 19 17:41:46 CET 2014

Hi all,

I have two questions about the usage of this macro.

Should I use this macro for new drivers which I'm working for?'

My drivers support some firewire devices, which is desinged for 
studio-use and have many channels. Its combination of channels are not 
designed for surround sound like 5.1ch.

Just judging from its name, 'SNDRV_PCM_CLASS_MULTI', I should use this.
But there are no drivers which use this macro in current tree, against 
my expectation that some drivers (ICE1712-pro, RME9652, 6fire usb and so 
on) should use this macro.

Are there any reasons?


Takashi Sakamoto
o-takashi at sakamocchi.jp

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