46 lines
2.1 KiB
HTML
46 lines
2.1 KiB
HTML
---
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layout: default
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title: Handling Overlapping Notes
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menu-title: Overlapping Notes
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---
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<p>
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Every MIDI note consists of two messages, a NoteOn and a NoteOff. Each one
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has a note number and a channel (also a velocity, but that isn't relevant
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here). The MIDI standard stresses that it is invalid to send a second NoteOn
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for the same note number on the same channel before a NoteOff for the first
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NoteOn. It is more or less impossible to do this with a physical MIDI
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controller such as a keyboard, but remarkably easy to trigger when editing
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in a DAW - simply overlapping two instances of the same note will do it.
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</p>
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<p>
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Ardour offers many options for how to deal with instances where you overlap
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two instances of the same note. Which one to use is a per-session property
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and can be modified from <kbd class="menu">Session > Properties > Misc > MIDI
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Options</kbd>.
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</p>
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<dl class="wide-table">
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<dt>never allow them</dt>
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<dd>Edits that would create note overlaps are not allowed</dd>
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<dt>don't do anything in particular</dt>
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<dd>Ardour leaves overlapping notes alone — the behaviour of a MIDI receiver (plugin or hardware) is undefined</dd>
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<dt>replace any overlapped existing note</dt>
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<dd>When one note is moved to overlap another, remove the one that wasn't being moved</dd>
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<dt>shorten the overlapped existing note</dt>
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<dd>When one note is moved to overlap another, shorten the one that wasn't moved so that there is no overlap</dd>
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<dt>shorten the overlapping new note</dt>
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<dd>When one note is moved to overlap another, shorten the one that was moved so that there is no overlap</dd>
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<dt>replace both overlapping notes with a single note</dt>
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<dd>When one note is moved to overlap another, merge them both to form one (longer) note</dd>
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</dl>
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<p>
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Changing the option in use will not retroactively make changes — it will
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only affect new note overlaps created while the option remains chosen.
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</p>
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<p class="warning">
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Ardour does not check for note overlaps across tracks or even across regions.
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If you create these, it is your responsibility to deal with the consequences.
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</p>
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