Hi John,

Only the Tyros 4 has individual drum part editing of each part in a single drum track.

All u can do with the PSR is EQ and add effects to the entire track. u can however customise a style to create multiple drum tracks that each have different Volumes and parameters.
example: Drum Track 1 - bass kick only.
Drum Track 2 - snares and hi hats
Drum Track 3 - brushes and so forth - but u are still limited to a total of 8 tracks per style - so u will be sacrificing other style parts.

Nick