RE: Sound with metal effect

[Lee Revell <rlrevell@joe-job.com>]

On Fri, 2005-04-01 at 17:17 +0200, Laurielle LEA wrote:
> In fact, in my read function, 
> 
> count = 320;
> rc = snd_pcm_readi(audio_hdl, (short*)ptr, count);
> I have to have rc = 320 but I receive just 160.
> 
> You tell me about other algorithms but I don't
> understand everything. Maybe I have to add other init
> hardware parameters ?
> 

Your read function takes the third argument in bytes.  But snd_pcm_readi
expects "count" to be in frames.  It looks like you have an 8 bit stereo
stream, or 2 bytes per frame.  So you did get 160 frames (320 bytes).
It looks like you need to set the device to 8 bit mono.

Please see alsa-lib/test/latency.c for an example of the correct usage.

Lee



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