Bill...

I make my own WAV or AIFF files from my own sequences. So, in the studio, I form my arrangement and sequence it into the Motif ES or XF. Then I create a stereo WAV by playing the song into my audio interface and into my DAW (Presonus Studio One 2.6). I might add some processing and then I mix it down to a WAV file. I'll drag that file onto my thumb drive. Then I go to the Roland BK9 and play the file. My keyboard is still active so I can play a live performance along with the background track.

A normal .WAV is a wave file at 16bit and 44.1 kHz. A normal 4 minute song takes up 40MB. So, 10 songs 400MB... 100 songs 4GB of information. An .AIFF file is just like a WAV but Apple used this format.

There are many different tracks online... both MIDI and WAV.

Also, you could use the audio recorder on the BK9 and playback MIDI files and press record... then it should have a WAV or AIFF file in your My Recordings file on the BK9 thumb drive.

Email me if you want to talk more about this.

~Johnathan - - - shueymusic@gmail.com