[makapuf]

I tried passing stereo wavs in 2 x 16bits (4bytes) as rgba for qoi but I haven't been very successful.

[adgjlsfhk1]

That's not surprising. QOI is heavily optimized for images which tend to be relatively continuous, while audio tends to oscillate a ton.

[cycomanic]

It might work to fourier transform first (although likely will kill performance)

[adgjlsfhk1]

fixed size FFT (eg length 64) can be made scary fast.