I don't think whatever method you're using to convert the image to PCM samples is correct/useful. Here are my results for MP3, Vorbis, Opus, at default settings, with the image interpreted as 8-bit mono samples.pic.twitter.com/pIoq2yuSBk
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I can't quite get my head around the shifted MP3... are the first n-samples from the input lost, then the next m-samples zeroed? (shift + black pixels) Is the darker Opus output due to some kind of automatic gain control or high-pass filter?
Yes, MP3 inserts zeroes at the beginning (hence all the problems with gapless playback of MP3 files). The darker Opus output is indeed due to a DC removal high-pass filter.
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Cool, thanks! I don't think I ever knew about / noticed MP3's gapless issues...
Thanks. Twitter will use this to make your timeline better. UndoUndo
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