On 01/15/2014 03:54 PM, Takashi Sakamoto wrote: > When I playback with 2ch application, then the samples are going to > every available channels. Hmm, I expected the stereo playback to only go to the first two channels. Let me try this later. > And I mind that PulseAudio tries the same times as the number of > settings in multichannels.conf. Each trial call snd_pcm_prepare() in the > end of snd_pcm_hw_params(). > > This is a bit problem for the devices because the drivers start stream > when snd_pcm_prepare() is called. No, if only "10 channels" is supported, then when trying "8 channels" and "12 channels" (and so on), it should not come as far as to starting and stopping streams - the driver should return earlier with some error, because the channel count does not match with the hw params constraint. >> ...but we might want a better match than just "firewire" in order not to >> catch the firewire speakers (if they have normal alsa mixers instead of >> hwdep control). > > Firewire speakers are just three models. > (Vendor ID/Model ID) > iSight: 0x000a27:0x000010 > Griffin: 0x001292:0x00f970 > Lacie: 0x00d04b:0x00f970 > > So we can write udev rules for them to distinguish from the others. > Please refer to '60-ffado.rules'. Ok, good. -- David Henningsson, Canonical Ltd. https://launchpad.net/~diwic
