Old 05-22-2019, 11:36 AM   #1
halfshavedyaks
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Default rule based MIDI editing / selection

Are there general tools for MIDI editing that allow arbitrary editing, or at least selection based on note characteristics?


For example things like:

* Select all notes less than 1/32 in length

* Set all velocities below 22 to 35 (for selected notes)

* select all notes below C3 with velocities larger than 70

* quantise all notes above A4 with durations less than 1/16

you get the idea.

I'm not looking for custom actions to do these things but rather some sort of control panel that allows such rules to be set on the fly and applied.

I'm open minded about the best way to achieve this, but at the moment I can't see any way to achieve these sorts of edits short of scripted custom actions for each one, which only makes sense for stuff that you do repeatedly.
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Old 05-22-2019, 12:55 PM   #2
lunker
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Much of what you're asking for can be achieved with the MIDI filter.

See page 231 of the current User Guide : https://www.reaper.fm/userguide/Reap...Guide5977g.pdf
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Old 05-22-2019, 01:46 PM   #3
juliansader
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Quote:
Originally Posted by halfshavedyaks View Post
I'm not looking for custom actions to do these things but rather some sort of control panel that allows such rules to be set on the fly and applied.

I'm open minded about the best way to achieve this, but at the moment I can't see any way to achieve these sorts of edits short of scripted custom actions for each one, which only makes sense for stuff that you do repeatedly.
Basic scripting is a bit more complex than Cubase's Logical Editor, for example, but once you have a little 10-line template script, is is just as fast to use as a control panel (and more powerful) -- and you don't need a new script for each action. The template script simply iterates through all notes and changes them, depending on some criteria.

* Instead of opening the control panel, open REAPER's script IDE (and you can keep it open in one corner of the screen).

* Instead of entering values in the panel, simply enter/replace the same values in the template script.

* Instead of clicking "OK" on the panel, click "Run" on the script IDE.

Want to select all notes with velocity below 22? Simply type "vel<22" and run. Want to select notes below C3 with velocities larger than 70? Type "pitch>60 and vel>70" and run.
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Old 05-22-2019, 04:23 PM   #4
halfshavedyaks
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Quote:
Originally Posted by lunker View Post
Much of what you're asking for can be achieved with the MIDI filter.

See page 231 of the current User Guide : https://www.reaper.fm/userguide/Reap...Guide5977g.pdf
you are quite right - most of it can - I haven't done any serious midi in reaper for a long time and I'd forgotten it.
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Old 05-22-2019, 04:37 PM   #5
halfshavedyaks
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Quote:
Originally Posted by juliansader View Post
Basic scripting is a bit more complex than Cubase's Logical Editor, for example, but once you have a little 10-line template script, is is just as fast to use as a control panel (and more powerful) -- and you don't need a new script for each action. The template script simply iterates through all notes and changes them, depending on some criteria.
do you have such a template script? sounds like it would be a good start on scripting as well as useful in itself.
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Old 06-16-2019, 03:45 AM   #6
juliansader
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Sorry, I forgot a bit about this thread. Here is an example of a script:
Code:
take = reaper.MIDIEditor_GetTake(reaper.MIDIEditor_GetActive())
item = reaper.GetMediaItemTake_Item(take)
reaper.MIDI_DisableSort(take)
countTotal, countNotes, countCCs, countSysex = reaper.MIDI_CountEvts(take)
for i = 0, countNotes-1 do
    noteOK, selected, muted, startTick, endTick, channel, pitch, velocity = reaper.MIDI_GetNote(take, i)
    -- CHANGE THESE LINES
    if pitch > 60 then 
        selected = true
    else
        selected = false
    end
    -- UP TO HERE
    reaper.MIDI_SetNote(take, i, selected, muted, startTick, endTick, channel, pitch, velocity, true)
end
reaper.MIDI_Sort(take)
reaper.Undo_OnStateChange_Item(0, "Logical editor: notes", item)
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Old 06-17-2019, 11:20 AM   #7
halfshavedyaks
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thanks! that looks pretty useful. I will try it when i get some time.

examples of how to change events rather than just select them would also be useful, though doubtless that's in the scripting documentation somewhere.
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