[phoboslab]

Traditional ADPCM is not terrible, it's just "meh". Compare:

- Original, 4039kb: https://phoboslab.org/files/qoa-samples/adpcm_comp/orig.wav

- MS ADPCM, 1022kb: https://phoboslab.org/files/qoa-samples/adpcm_comp/ms_adpcm....

- QOA, 812kb: https://phoboslab.org/files/qoa-samples/adpcm_comp/qoa.wav

IMA ADPCM is in the same ballpark as MS ADPCM. ADX (not listed) comes close to QOA, but at 1136kb is also larger than those traditional ADPCM flavors.

[stephc_int13]

I have a fairly decent audio system with a good dac and reasonable headphone.

MS ADPCM sounds horrible, a lot of unpleasant high-pitched noise. QOA is much better but still audibly degraded from the source.

Not sure I would ship content at this quality.