On 09/11/2009 03:22 AM, Clemens Ladisch wrote: > Piotr Sipika wrote: >> I'm attempting to introduce software volume control for a device on a >> system running openWRT. I'm able to control the volume for the device >> using alsamixer, but for values OTHER than 100 and 0, the sound being >> played contains noise. >> ... >> rate 8000 > > This looks like a device that uses 8-bit samples. > What is the output of "aplay -D playback_vol_channel1 something.wav"? > I think rate corresponds to the number of samples per second. The size of the sample (bits-per-sample) is set by the format, which in my case is set to SND_FORMAT_S16_LE (16-bit signed int). Here's the output of aplay using the device: # aplay -Dplay_channel1 stereo-int16.wav Playing WAVE 'stereo-int16.wav' : Signed 16 bit Little Endian, Rate 8000 Hz, Stereo Thanks, Piotr ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
