If the Yamaha midifile has specific voices or/and voicing that resides only in the YAMAHA Keyboard, then this song will not play properly in the Ketron SD7 ... or any other manufacturer's GM or GM2 unit. Re-voicing and choosing equivalent voices in the SD7 is available with the built in GM editor, however the results will not be the same as on the Yamaha Keyboard due to the different voice articulations.

The reverse is also true - taking GM files that were written for Ketron products (that factors in their live grooves/drums) and trying to play them on the Tyros .. drums and bass lines will not sound as good (if any).

Thanks.