Disklavier

Hi everyone:

I'm new to the group and recently got a Disklavier Mark IV Pro Grand Piano.

I have been having loads of fun playing around with it.

I had questions regarding importing digital audio files into the Disklavier's User Library if 
anyone knew.

1. Is there another way of importing digital audio files (not MIDI files) into the Disklavier 
User Library other than importing it from an audio CD?  I would like to do some SPS 
recording with MP3 files that I have on my computer.  I tried moving them through a USB 
flash drive to the Disklavier, but it won't recognize them.

2. I know when you import digital audio from the CD, it converts them into WAV files.  I 
tried converting my digital audio files to WAV format too, but the Disklavier wouldn't 
recognize them on my USB flash drive.  Is there a special encoding that it needs to be 
recognized, or it won't recognize any digital audio formats via USB?

If it's not possible, I hope Yamaha can make it so.  It would help take out the step of 
burning an audio CD on my computer and importing it onto the Disklavier for SPS 
recording.

- Mario