Does the Korg MP3 board support playback of ALL types of MP3 files:

1) MP3 Encoder Types: Lame & Fraehoffer
2) Bitrate 'Types': Constant, Average & Variable bit rate
3) Compression Rates: including 192, 224, 256, and 320kbps
4) Channel Types: Stereo, Joint Stereo, Mono

If I were to create & utilize the best acceptable MP3 files for live performance playback, I's highly recommend utilizing the LAME Encoder with 'variable bit rate' & 'joint stereo' settings, and encoding at 192kbps or better (preferably 320kbps).

Checkout the Hydrogen Audio website for discussion & the latest on audio compression. Here's Hydorgen Audio's sub-forum dedicated to MP3 compression. Well worth a read:

MP3 General

MP3 Tech

Scott