For this release, I decided to bundle the GBA executable's source code and the encoding/decoding executables (Windows only, sorry).
Although the source code has always been available on GitHub, it may be less annoying for users to have the source code all in one file, and including the pre-built conversion tools should also make it a lot easier to test your own files.
Because of the GBA's 8bit audio DAC, I had to perform a lot of equalization to get the track to sound right. After listening to it a lot more and comparing to the original, I realized I wasn't doing it justice and started the equalization process from scratch; sounds a lot closer to the original now. May have gone overboard on the bass, though...
Quality improvements from new a quantizer selection strategy. Not all /that/ noticeable in this demo (especially from an integer DCT), but more high-frequency bands are kept now, making things sound 'clearer'.