CompRec, though extremely poor quality (no psychoacoustic modelling! Old-school twinkly-burbly MP3s here we come!) is a fast MP3 encoder you can build on the SheevaPlug. It’s perfect for my limited needs.
(thanks to wb6ymh for finding this.)
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I am now starting to do mp3 encoder, and can you provide the fixed-point mp3 encoder, tks.
The Shine source is here: http://mp3-tech.org/programmer/encoding.html