It looks like rosegarden sets the duration of the notes manually
inserted from the piano roll into the drum track to 3840. This causes
the velocity ruler to appear clogged up like you can see in the attached
Feature request: can we have a way to selectively mute notes into the
piano roll/sheet without actually deleting them? (LPX have a similar
Any way to fix a drum track with wrong durations?
Have you ever considered moving the development of the rosegarden
project to GitLab/GitHub?
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