here i made a bit simpler chart:
(focusing on the notation structure)
-----------------------------
RTTL
-----
[Duration]note[Octave]
-----------------------
example: 8G5
Durations:
---------
1 a full note
2 a half note
4 a quarter note
8 an eighth note
16 a sixteenth note
32 a thirty-second note
Octaves:
-------
1,2,3,4,5,6,7
Pitch:
-----
a Note A
a# Note A-sharp
b(or h) Note B (or Cb)
c Note C
c# Note C-sharp
d Note D
d# Note D-sharp
e Note E
f Note F
f# Note F-sharp
g Note G
g# Note G-sharp
p Rest or pause
now, let's do the same example with the Instrument mod:
'BIM'
-----
[Octave]note[Duration]
-----------------------
example: 5G/
Durations:
---------
- for whole (act as full note)
_ for half (act as half note)
$ for quarter (act as quarter note)
/ for eighth (acting as eighth note)
; for sixteenth (acting as sixteenth note)
;; for thirty-second (acting as thirty-second note,by combining two sixteenth)
Octaves:
-------
typically 3,4,5,6
(depends what instrument being used)
some instruments support 4,5,6
Pitch:
-----
A Note A
AS Note A-sharp (A#)
B Note B
C Note C
CS Note C-sharp (C#)
D Note D
DS Note D-sharp (D#)
E Note E
F Note F
FS Note F-sharp (F#)
G Note G
GS Note G-sharp (G#)
("For sharps you can use # or S")
edit: i added the pitches.