Sox command line to downsample Pcm to Flac Options

[andrewfg]

Can anyone please tell me the switches needed for downsampling hi-res Pcm (Std_In) to lo-res Flac (Std_Out)?

I am trying the following, but at 192000Hz neither the big nor little endian variety works.

CODE

sox.exe -q -t raw -s -b24 -c2 -r192000 -L - -t flac -C0 - rate 48000 => outputs distorted audio
sox.exe -q -t raw -s -b24 -c2 -r192000 -B - -t flac -C0 - rate 48000 => outputs white noise

Whereas (oddly enough) at 96000Hz the little endian works, but the big endian does not.

CODE

sox.exe -q -t raw -s -b24 -c2 -r96000 -L - -t flac -C0 - rate 48000 => works !!
sox.exe -q -t raw -s -b24 -c2 -r96000 -B - -t flac -C0 - rate 48000 => outputs white noise

Don't ask me why, but the fact that at 96000Hz an extra byte order flip makes a difference to the success rate, gives me a gut feeling that sox.exe is somehow hitting an internal timing issue or lack of CPU capacity (e.g. thread timing issue?).

[chi]

Well, your audio seems to be little-endian, in any case.

To go on, we’ll need to know at least where standard input is coming from – is it something processing a file, or directly from an audio input? Also, more about the kind of “distortion” might be useful: Are chunks of the audio missing? Is the pitch wrong? Unexpected noise? Etc.