For the most part, these files should work on the PSR: 1000/2000; 1100/2100; 1500/3000; S700/S900 and the Tyros and Tyros2. The SFF-1 conversions were done on a PSR-3000. Re-voicing was applied only to the OTS voices, where necessary. No re-voicing was done to the accompaniment voices, but some additional re-voicing, to either the OTS or accompaniment voices, may be necessary on keyboards other than the PSR-3000. If you come across the occasional style part that produces dissonant sound, I assume that this is due to style CASM damage during the conversion process, and for which, I currently have no solution.