Multichannel SD Card Audioplayer
If you want to play multichannel audiofiles without computer and interface, have a look at http://www.waveplayer.de
By using an expansion board, you can play up to 8 channels of WAV (44100 Hz / 16 Bit).
If that´s not enough - cascade the players and they will they run in sync : )
Soundfiles can be accessed via MIDI or RS232.
The player itself costs 69 Euro, the expansion board 59 Euro.
Kind regards,
Julius