Hi, All playback sounds too fast, some players seem faster then others, but I maybe wrong on that. The source file's sample rate seems to make no difference, i've tried 22k,34k,44k,48k. I have now been given a sin wave generator script, which I've been meaning to try, but I lack an OCR so I will have to rely on my hearing. ALSA doesn't need to change sample rate, nor will it if the sample is within the range supported/reported by the driver (as far as i know). Mace audio supports 8k to 48k. You can look at the set clock speed for the DAC in /proc/asound/card0/ad1843 You can manually override the clock speed by playing with ad1843_setup_dac in ad1843.c You can try lying to ALSA by playing with snd_mace_audio_hw[1] (or sma_audio_hw[1]) in mace_audio.c If anyone can see why it plays too fast, please let me know. Thorben On 12/07/07, sknauert@xxxxxxxxxxxx <sknauert@xxxxxxxxxxxx> wrote:
Okay, I got the module compiled and it and ALSA installed. I noticed the timing bug, I doubt its a frequency issue as the ALSA guides to downsample (i.e. if it were doing 48kHz instead of 44.1kHz) didn't help. You mentioned on some players it would sound okay? I tried everything from aplay to xmms and always seemed to play too fast. What CPU are you running this on, by the way? Aplay does give underruns if I'm heavily multitasking, though sound output seems the same.
