Re: [alsa-devel] how to convert stereo capture to mono stream (hardware incompatibility)

brunal wrote:

There is an implementation of alsa in Julius, but I can't make it working with my USB sound card, because when alsa tries to set channel capture to 1, I get an error from alsa. Here is the code :

/* set number of channels */ if ((err = snd_pcm_hw_params_set_channels(handle, hwparams, 1)) < 0) { jlog("Error: adin_alsa: cannot set PCM channel to %d (%s)\n", 1, snd_strerror(err)); return(FALSE); } Which always return FALSE.

I'd guess this program uses a wrong device name. Make sure that the default device name is "default", which can automatically convert sample formats not supported by the hardware, and not "hw".

HTH Clemens