This package is a proof of concept of wavelet transform-based lossless audio codec. wavelet-audio uses (4,2) B-spline wavelet and Rice entropy coding to compress audio. Compression speed is slow, decompression speed is much faster.
Compression ratio is 25-50% and is comparable to ratio of flac codec.
(wavelet-audio:encode-wavelet-audio "~/file.wav" "~/file.wa")
(wavelet-audio:decode-wavelet-audio "~/file.wa" "~/file.wav")
Visit the project page on github pages.