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Old 05-02-2019, 06:57 AM   #1
Monoko
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Default Bar keeps messing up my piano roll

When I move the grey bar inside the piano roll, it also moves the stuff on the left side. How do I fix it? What's the purpose of this bar anyway?
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Old 05-02-2019, 07:09 AM   #2
DarkStar
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Hello Monoko and welcome to these forums. You'll find many helpful people here and a lot of useful information. Make sure that you:
If that grey bar is the one that I am thinking of, it indicates the end of the MIDI item. Notes to the right of it are repeats of those notes from that start of the item. Moving the grey bar changes the length of the MIDI item.
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Old 05-26-2019, 05:04 AM   #3
Monoko
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Default Bar keeps messing up my piano roll

Hi DarkStar,

Thank you for your reply.

Yes, moving the grey bar does change the lenght of the MIDI item, but occasionally it additionally moves the notes that are on the left to the right. I don't want that.

Best regards,

Monoko
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Old 05-26-2019, 11:43 PM   #4
hopi
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grey bar? are you talking about the far right edge of the item? it sounds like you are dragging that to the right which causes the item to loop

try this
back in arrange window get info for the item and uncheck the loop source button and apply and OK

now do yer thing in the midi editor
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Old 05-27-2019, 02:05 AM   #5
Monoko
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Wow, this finally fixed the problem!

Thank you so much!!
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Old 05-27-2019, 06:04 AM   #6
juliansader
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When "Allow Trim of MIDI items when splitting" (aka destructive editing of MIDI items) is disabled in preferences, it may result in the underlying MIDI *source* start/end being different from the visible MIDI item edges, which in turn may result in some unexpected behavior, as also discussed in "Extending MIDI take" error (video) and other threads.

To quote my post from that thread:

In the project, the MIDI item's underlying MIDI source extends beyond the left border of the item, so the source's start point is hidden to the left of the item.

When moving a loop marker, REAPER must decide whether to stretch/shrink the loop region relative to the preceding marker (to the left), or relative to the next marker (to the right).

If I understand correctly, the preceding marker usually takes priority, but if it is not visible, REAPER will use the next marker:



The stuff on the left side may also move if tempo is changed across the hidden parts of the MIDI source, as discussed in https://forum.cockos.com/showthread.php?t=182196:
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Old 05-29-2019, 07:39 AM   #7
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OMG Julian... that was unknown to me and very informative... thanks so much!
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