just something i found on freshmeat. looks interesting - "The 02-Sep-99 Version of agalophone adds a "rawwrite" module, filtering/upsampling/downsampling modules, an "adder" module, and much improved documentation. Many new demos are included, such as improved real time MP3 comparisons, spectrograms, and a demonstration of Smith-Barnwell perfect reconstruction filter banks. Aglaophone is easier to use than ever, and most of the demonstrations no longer require multiple soundcards. " http://www.tam.cornell.edu/~sdh4/aglaophone/ later mike -- MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )