These patches were compiled on a macintosh, they are saved as a Standard format 0 midi file. Just set up your midi port your sid is on in and or the midi channel and play. You ought to be able to use this with a pc as i have added the .mid extension that pc's require for file association. If not it will be corrected shortly so that it does. Mac users should know that the file type is correctly set to Midi, but in the transition to the web it lost it's creator code...you can change it to whatever sequencer or program you want. It will then take on something other than a Defaulted White icon. When you play this midi file back it will REWRITE all patches from 0 to 19 without warning you first!!! If you pick out seperate sysex bits and load those up they will write to the next free space in your sid's memory. I believe the reason it does this has to do with the way the All Dump and All Recieve message is written (could use some work). So PLEASE back up your patches before using this or any midi file of sidstation sysex. Thanks & Enjoy! christian