Cassp, why not use the Audio Recorder built in to the S910? It records to Wav., and very nicely too.

There are lots of programs to convert Wav. to MP3 on your PC.

Ian
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Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.