Hi! I'm interested in losless compression of typical Jack audifiles for exchange. That means float32 sample format. Flac doesn't handle float, only pcm. wavpack handles both. So I was told that converting from (wav) float32 to pcm24 and back should be losless, if the float file is normalized. This would cut down on file-size by itself and allow to use Flac. I tested this using sndfile-convert and diff tells me there are differences. The file sizes are identical. diff did not report differences for a wav-unpacked file (staying in float32). Now I wonder if I did something wrong (I'm pretty sure the source file is normalised), or if there's a bug in sndfile-convert or if the differences are in the header. diff is a tool for text, after all. Anyways, file size results, didn't care about time: 48kHz, float 32: - original wav: 59.1 MB (my Aliethno track) - wavpack: 39.9 MB pcm24: - wav: 44.4 MB - wavpack: 32.3 MB - flac: 37.4 MB I used wavpack -h and flac -8 for best compression ratios. (Well, just saw wavpack has a -hh switch) -- Thorsten Wilms Thorwil's Creature Illustrations: http://www.printfection.com/thorwil
