At Thu, 16 Oct 2008 22:07:02 +0200, Bjoern Olausson wrote:

I found a site with a large range of files: http://bellatrix.ece.mcgill.ca/Documents/AudioFormats/WAVE/Samples.html

aplay plays all files it is capable to decode. No crackel, no noise, just fine.

glass.wav Signed 16 bit Little Endian, Rate 8000 Hz, Mono

M1F1-int16-AFsp.wav Signed 16 bit Little Endian, Rate 8000 Hz, Stereo

M1F1-int24-AFsp.wav Signed 24 bit Little Endian in 3bytes, Rate 8000 Hz, Stereo

M1F1-int32-AFsp.wav Signed 32 bit Little Endian, Rate 8000 Hz, Stereo

M1F1-uint8-AFsp.wav Unsigned 8 bit, Rate 8000 Hz, Stereo

stereol.wav Signed 16 bit Little Endian, Rate 22050 Hz, Stereo

Utopia_Critical_Stop.wav Signed 16 bit Little Endian, Rate 22050 Hz, Mono

Thought when I try to play the first one with mplayer ---> FREEZZZZZ Spiele glass.wav. Audio file-Dateiformat erkannt! ========================================================================== Öffne Audiodecoder: [pcm] Uncompressed PCM audio decoder AUDIO: 8000 Hz, 1 ch, s16le, 128.0 kbit/100.00% (ratio: 16000->16000) Ausgewählter Audiocodec: [pcm] afm: pcm (Uncompressed PCM) ==========================================================================

Then likely a problem with mplayer. Can you check which parameters (period_size, buffer_size) does mplayer use, and try to pass to aplay via --period-size and --buffer-size options?

Amarok with backend ALSA plays all files it can decode without problems.

All Signed 16 bit Little Endian, Rate 8000 to 96000 Hz, Stereo do work (with the same oszilating noise described in my previous post with the mono files [I just joned two to get stereo])

Hm, mono isn't supported by this hardware, so alsa-lib simply duplicates the signals to the stereo. There shouldn't be any difference in that manner...

Takashi