Roland U20 standard drum map
  0   B  0   Bass Drum 1
  1   C  1   Bass Drum 2
  2   C# 1   Rim-Shot
  3   D  1   Snare Drum1
  4   D# 1   Hand Clap
  5   E  1   Snare DRUM2
  6   F  1   Lo TomTom 1
  7   F# 1   Clsd HiHat1
  8   G  1   Lo TomTom 2
  9   G# 1   Open Hihat2
 10   A  1   Md TomTom 1
 11   A# 1   Open Hihat1
 12   B  1   Md TomTom 2
 13   C  2   Hi TomTom 1
 14   C# 2   CrashCymbal
 15   D  2   Hi TomTOM 2
 16   D# 2   Ride Cymbal
 17   E  2   ChinaCymbal
 18   F  2   Cup (mute)
 19   F# 2   Tambourine
 20   G  2   Spsh Cymbal
 21   G# 2   Cowbell
 22   A  2   CrashCymbal
 23   A# 2   Snare Drum3
 24   B  2   Ride Cymbal
 25   C  3   Bongo-H
 26   C# 3   Bongo-L
 27   D  3   Conga(mute)
 28   D# 3   Conga-H
 29   E  3   Conga-L
 30   F  3   Timbale-H
 31   F# 3   Timbale-L
 32   G  3   Agogo-H
 33   G# 3   Agogo-L
 34   A  3   Cabasa
 35   A# 3   Maracas
 36   B  3   S. Whistle
 37   C  4   L. Whistle
 38   C# 4   Vibra Slap
 39   D  4   Bell Tree
 40   D# 4   Claves
 41   E  4   Guiro 2
 42   F  4   Guiro 1
 43   F# 4   Castanets
 44   G  4   HiPitchTom2
 45   G# 4   Triangle
 46   A  4   HiPitchTom1
 47   A# 4   Wood Block
 48   B  4   Jingle Bell
 49   C  5   Bass Drum 3
 50   C# 5   Bass Drum 4
 51   D  5   Snare Drum4
 52   D# 5   Snare Drum5
 53   E  5   Snare Drum6
 54   F  5   Lo TomTom 3
 55   F# 5   Clsd HiHat2
 56   G  5   Md TomTom 3
 57   G# 5   ChinaCymbal
 58   A  5   Hi TomTom 3
 59   A# 5   Ride Cymbal
 60   B  5   N. Drum-1
 61   C  6   N. Drum-2
 62   C# 6   N. Drum-3
 63   G  8   -----------

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Good Luck!

Malcolm
s925377@mailserv.cuhk.hk