From mboxrd@z Thu Jan  1 00:00:00 1970
From: Clemens Ladisch <clemens@ladisch.de>
Subject: Re: how to convert stereo capture to mono stream
 (hardware incompatibility)
Date: Thu, 04 Sep 2008 12:58:16 +0200
Message-ID: <48BFBF48.9060306@ladisch.de>
References: <AAE526C2-EE39-474B-B9E4-683E62B34D33@gmail.com>
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To: brunal <brunal2496@gmail.com>
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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