Effects Qxy and Rxy
From Famitracker Wiki
Qxy and Rxy are direct note slide effects that slide to the next note at a user-definable speed. It is used as an alternative to 3xx. y is the number of semitones to sweep to, x is the speed at which the slide should be performed.
Qxy slides up to the next note by decreasing the frequency register by 2x+1 per frame. Rxy slides down to the next note by increasing the frequency register by 2x+1 per frame.
C-4 00 F --- --- -- - --- --- -- - Q54 --- -- - --- --- -- - --- --- -- - R19
C-4 is note, 00 is instrument number, F is volume. Quickly slides to E-4 at row 02 (C+4=E) and slowly slides to G-3 at row 05 (E-9=G).