On Fri, 27 Mar 2020 16:50:13 +0100, Jonas Holmberg wrote: > > CC Takashi. > > On Thu, Mar 26, 2020 at 02:41:11PM +0100, Jonas Holmberg wrote: > > Hi, > > I use the route plugin to copy mono to both FL and FR (front left and > > front right stereo) of the slave during playback. When get_chmap() is > > called in the route plugin it will call get_chmap() of the slave, > > which returns 2 channels with FL and FR positions, and then route > > itself returns 1 channel with FL position. But the application that > > called snd_pcm_get_chmap() on the playback device expected to get > > position MONO instead of FL since the number of channels is 1. > > > > Is the application wrong in not accepting the chmap or should the > > route plugin have changed position from FL to MONO? Is it possible to > > add something to the config (asound.conf) to make FL become MONO in > > the reply of get_chmap() or solve the problem in any other way? Well, that's a small missing piece in the route plugin implementation. It may have a capability to translate the destination channel map, e.g. by extending the config syntax. If anyone has a patch proposal, I'm willing to apply :) thanks, Takashi
