The PSR-S900's Audio to USB records in WAV...perfect for CD...you can easily convert to MP3 if that's the format you want.
Making a CD is a no muss, no fuss operation.
Ian
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Yamaha Tyros4, Yamaha MS-60S Powered Monitors(2), Yamaha CS-01, Yamaha TQ-5, Yamaha PSR-S775.