A.
Yes, you can.
Please insert the following System Exclusive Message in the same tick as the note that you want to put the indicator.
F0H 41H 10H 00H 45H 12H 19H kkH 00H ddH sum F7H
F0H : Exclusive status
41H : ID number (Roland)
10H : Device ID
00H : Model ID #1 (DT-HD1)
45H : Model ID #2 (DT-HD1)
12H : Command ID (DT1)
19H : Address upper byte (9 = MIDI channel)
kkH : Address middle byte (kk = note number) (00-7FH)
00H : Address lower byte
ddH : Data (Right = 00H, Left = 40H)
sum : Checksum
F7H : EOX (End Of Exclusive)
* Examples of System Exclusive Messages and their corresponding instruments.
Snare Right(#38): F0 41 10 00 45 12 19 26 00 00 41 F7
Snare Left (#38): F0 41 10 00 45 12 19 26 00 40 01 F7
Tom 1 Right(#48): F0 41 10 00 45 12 19 30 00 00 37 F7
Tom 1 Left (#48): F0 41 10 00 45 12 19 30 00 40 77 F7
Tom 2 Right(#45): F0 41 10 00 45 12 19 2D 00 00 3A F7
Tom 2 Left (#45): F0 41 10 00 45 12 19 2D 00 40 7A F7
Tom 3 Right(#43): F0 41 10 00 45 12 19 2B 00 00 3C F7
Tom 3 Left (#43): F0 41 10 00 45 12 19 2B 00 40 7C F7
Closed hi-hat Right(#42): F0 41 10 00 45 12 19 2A 00 00 3D F7
Closed hi-hat Left (#42): F0 41 10 00 45 12 19 2A 00 40 7D F7
Open hi-hat Right(#46): F0 41 10 00 45 12 19 2E 00 00 39 F7
Open hi-hat Left (#46): F0 41 10 00 45 12 19 2E 00 40 79 F7
Crash cymbal Right(#49): F0 41 10 00 45 12 19 31 00 00 36 F7
Crash cymbal Left (#49): F0 41 10 00 45 12 19 31 00 40 76 F7
Ride cymbal Right(#51): F0 41 10 00 45 12 19 33 00 00 34 F7
Ride cymbal Left (#51): F0 41 10 00 45 12 19 33 00 40 74 F7