Hi tom = note 48 and 50
Mid tom = 45 and 47
Floor tom = note 41 and 43
There are 2 notes for the same sound, for easy 2-keys rolling I guess. Each tom can be panned individually.
Or, you can also open SD3 with individual drum per Sonar track :-
At the Insert Soft Synth Options
- uncheck simple instrument track
- check Midi source
- check synth track folder
- check All synth audio outputs : stereo