[PYTHON] Script that changes the length of the sound with REAPER

Introduction

About 20 years ago, I was stepping in Logic There is a function to extend the length of the sound with the TAB key, A memo that I thought that a REAPER script could do something similar.

script

tatAddLength.py

RPR_ClearConsole()

midieditor = RPR_MIDIEditor_GetActive()
take = RPR_MIDIEditor_GetTake( midieditor )

notecntOut = 0
ccevtcntOut = 0
textsyxevtcntOut = 0

( retval, take, notecntOut, ccevtcntOut, textsyxevtcntOut ) = RPR_MIDI_CountEvts(take, notecntOut, ccevtcntOut, textsyxevtcntOut )

noteidx = notecntOut-1  #last note
selectedOut = True
mutedOut = True
startppqposOut = 0
endppqposOut = 0
chanOut = 0
pitchOut = 0
velOut = 0

( retval, take, noteidx, selectedOut, mutedOut, startppqposOut, endppqposOut, chanOut, pitchOut, velOut ) = RPR_MIDI_GetNote(take, noteidx, selectedOut, mutedOut, startppqposOut, endppqposOut, chanOut, pitchOut, velOut )

retval = RPR_MIDI_SetNote( take, noteidx, True, mutedOut, startppqposOut, endppqposOut+240, chanOut, pitchOut, velOut, False )

adjust = 0.125 * 120/RPR_TimeMap2_GetDividedBpmAtTime(0,0.125) # Tempo
RPR_MoveEditCursor(adjust, False)

Points that do not go well

Is the unit for extending the sound different from the unit for moving the cursor?

--Change the length of the sound

retval = RPR_MIDI_SetNote( take, noteidx, True, mutedOut, startppqposOut, endppqposOut+240, chanOut, pitchOut, velOut, False )

The value specified by SetNote is a MIDI resolution value called QN. Since the 16th note is the main note, 240 is added in a fixed manner.

** * QN can be handled musically and musically without depending on the tempo. On the other hand, it is necessary to refer to the global tempo to convert it to real time. ** **

960 = quarter note 480 = eighth note 240 = 16th note

--Move the cursor

adjust = 0.125 * 120/RPR_TimeMap2_GetDividedBpmAtTime(0,0.125) # Tempo
RPR_MoveEditCursor(adjust, False)

MoveEditCursor ... I don't really understand this.

By trial and error, I feel that if I put 1 at BPM120, it advances by 1 beat. I thought it was time, and even if I tried QNTotTime or something like that, it was different ...

RPR_TimeMap2_GetDividedBpmAtTime(0,0.125) Returns the same value as the tempo, so start from 120 and Now that I have the length of one beat, I multiply it by 1/4 to make it 16th note length. ** * I'm not sure if it fits here **

Key setting

Perhaps the TAB key systematically switches views, so assigning shortcuts doesn't feel good. (It doesn't work well even if assigned) So, this time I decided to use the X of the lower left key. I often use Ctr-Z when I make a mistake.

Also, I tried to advance only 16th notes with the C key. Image with rests.

** * The X key is also batting such as closing the window, and sometimes it does not work well ... a mystery. ** **

It ’s a little different, but I ’m generally satisfied.

At the time of Logic, it was to stretch the sound (the length is uncertain) before the note-off came, so it was also a chord. In REAPER, only the last note recorded is extended.

Grid compatible

――I fixed the 16th note, but I wonder if it can be changed here. To fit the grid.

( grid, take,  swingOutOptional,  noteLenOutOptional) = RPR_MIDI_GetGrid(take, 0, 0)

retval = RPR_MIDI_SetNote( take, noteidx, True, mutedOut, startppqposOut, endppqposOut+960*grid, chanOut, pitchOut, velOut, False )

adjust = grid * 60/RPR_TimeMap2_GetDividedBpmAtTime(0,0.25) # Tempo

Is it like this?

tatAddLengthGrid.py

RPR_ClearConsole()

midieditor = RPR_MIDIEditor_GetActive()
take = RPR_MIDIEditor_GetTake( midieditor )

notecntOut = 0
ccevtcntOut = 0
textsyxevtcntOut = 0

( retval, take, notecntOut, ccevtcntOut, textsyxevtcntOut ) = RPR_MIDI_CountEvts(take, notecntOut, ccevtcntOut, textsyxevtcntOut )

noteidx = notecntOut-1  #last note
selectedOut = True
mutedOut = True
startppqposOut = 0
endppqposOut = 0
chanOut = 0
pitchOut = 0
velOut = 0

( retval, take, noteidx, selectedOut, mutedOut, startppqposOut, endppqposOut, chanOut, pitchOut, velOut ) = RPR_MIDI_GetNote(take, noteidx, selectedOut, mutedOut, startppqposOut, endppqposOut, chanOut, pitchOut, velOut )


( grid, take,  swingOutOptional,  noteLenOutOptional) = RPR_MIDI_GetGrid(take, 0, 0)

retval = RPR_MIDI_SetNote( take, noteidx, True, mutedOut, startppqposOut, endppqposOut+960*grid, chanOut, pitchOut, velOut, False )

adjust = grid * 60/RPR_TimeMap2_GetDividedBpmAtTime(0,0.25) # Tempo
RPR_MoveEditCursor(adjust, False)

ToDo: -Allow it to be extended with the pedal (This is MIDI, but what should I do if it accidentally explodes when the mode is different? I want it to work only when stepping in) --Something like erasing while returning --Chord support (this seems to be possible if applied to the same start note as the last note)