On Sun, Aug 16, 2009 at 03:53:20PM +0200, Wolfgang Pfeiffer wrote: > Hi All > > PowerBook5,8 here. > > I want to play a sound file that is coded to 24 bits/96000 Hz at > exactly these sample rates. > > $ file 24-96-sound.wav > 24-96-sound.wav: RIFF (little-endian) data, WAVE audio, Microsoft PCM, 24 > bit, stereo 96000 Hz > > Apple says the soundcard I have is able to do 16 or 24 bits, and > sample rates of up to 96KHz: > > "The audio circuitry and audio device drivers handle audio data in > multiple formats. Both digital and analog audio circuitry handle audio > input and output data at sample rates of 32.0 kHz, 44.1 kHz, 48.0 kHz, > 64.0 kHz, 88.2 kHz, and 96.0 kHz at sample depths of 16 bits and 24 > bits."
1: Meantime I doubt this card can do 24 bits: after lots of testing it looks it can do 16 and 32 bits only. 2: I found and installed/edited an old ~/.aoundrc file. You find it attached to this email. It works in that it uses a fixed sample rate of 96000 Hz for anything you feed to your different sound players. I hate this solution, as nowadays alsa simply should look at the file that's fed to it, and then - per default - play it exactly as it was coded, limited only by the capabilities of the sound card: e.g. a file with 96000 Hz should be played at exactly that rate, and one with 44100 Hz with 44100 Hz. But it's a - so far - working compromise. If in doubt don't use the attached ~/.asoundrc: I cannot guarantee it won't break things on your system. 3: Thanks to Michel Dänzer who - if my memory serves me well - published an .asoundrc many years ago that helped me set up most parts of the one attached to this email. Again, don't use it: things might have changed greatly meantime ... HTH Best Regards Wolfgang -- http://heelsbroke.wordpress.com -- To UNSUBSCRIBE, email to debian-powerpc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
