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

Takashi Sakamoto mocchi.sakamoto113 at gmail.com
Thu Feb 20 03:28:48 CET 2014

Hi David,
(My message was not delivered by ALSA's mailman...)

Again 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?

In current tree, there are no drivers which uses this macro.

As long as I investigated in ftp server, this macro is firstly added in 
ALSA 0.9.0beta1 (2001/02/21). So this macro has been ignored over 10 


Takashi Sakamoto
o-takashi at sakamocchi.jp

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