Bilingual (EN/FR) official site and MP3 download platform of French composer Thierry Cassagneau proposing his MP3 music catalogue in classical music, electronic music and opera. Visitors can freely listen to excerpts and get descriptive information about albums content and genesis, written by the author, at a pdf format. This site offers the possibility to purchase and download MP3 albums. The MP3pro format constitutes the next generation of the most popular Internet music format. Fully compatible with the MP3 format, it allows an audio CD listening quality at a bit rate varying from 64 kbps (half the standard MP3) to 111 Kbps while widening the audible frequencies bandwidth. It relies on novel algorithms notably allowing a replication of the highest audible frequencies on a lower frequency bandwidth for encoding (spectral band replication); which are fully recalculated during decoding.