improve resampler and/or gaussian?

Optiroc / BRRtools

Tools to convert between standard RIFF .wav format and SNES's built-in BRR sound format

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Open nyanpasu64 opened 5 years ago

nyanpasu64 commented 5 years ago

samples are a bit more muffled than they should be even with -g.

cymbal playing at near-exactly 32000khz (spc700 steps by 1 sample) is muffled compared to 44100khz (step by >1)
- unsure how much can be done, considering the snes gaussian changes frequency response depending on phase,
wavetable sweep sounds quite muffled at 192 samples long, despite fine on n163

nyanpasu64 commented 3 years ago

The resampler is pretty bad.

when downsampling in bandlimited mode, audio significantly above the output's Nyquist rate is folded instead of silenced.
On some samples, resampling a properly looped (but possibly non-multiple-of-16) sample leads to a loud pop when the .brr loops (the sample is not looped properly).