Hi Sample Rate MONO files on OSS/BSD play 2x speed
Hi - I have Strawberry 3.0 installed on FreeBSD machine with a USB sound card that supports 96/24 rate. I have been digitizing my vinyl collection into 96/24 flacs for the past several years. For older records that are mono, I create a mono flac file to preserve disc space.
When I play such files it sounds like the Chipmunks -- the sound is playing like a 3.25 ips reel recording set at 7.5 ips for playback. I.e. the sound is shifted up one octave and playing twice normal speed tempo wise. I presume pairs of mono samples are getting sent to the DAC as a Left and Right sample for a given time slice. For native stereo 96/24 flac files, the problem doesn't manifest.
The identical mono flac files do not manifest this problem on my linux (arch/straight alsa) machines running Strawberry 3.0. It also doesn't happen with slower sample rate mono files in BSD/OSS.
Tonight I figured out the workaround of turning on the settings option of "Upmix / Downmix to 2 channels". So my files now play correctly -- just thought you might be interested to know of a potential OSS bug.
@poppop LOL - I kept typing vsn 3.0 of Strawberry. You are probably wondering how I got such an advance copy! I had "3.0" on my mind because of the new Blender major release this weekend, haha. I meant to type Strawberry 1.0, needless to say.