0007533: MIDI loopback recording loses note at time 0 - MantisBT

ID	Project	Category	View Status	Date Submitted	Last Update

0007533	ardour	bugs	public	2017-12-27 02:14	2017-12-28 00:30

Reporter	negativezero	Assigned To
Priority	normal	Severity	major	Reproducibility	always
Status	new	Resolution	open
Platform	Linux	OS	Debian testing + kxstudio
Product Version	5.X git (version in description)

Summary	0007533: MIDI loopback recording loses note at time 0
Description	Version: 1:5.11.4-1kxstudio1v5 from kxstudio repositories When routing the MIDI output of one track (with multiple notes, none of which are overlapping, including one at time 0) to the MIDI input of another and subsequently recording from time 0 on the latter track, the note at time 0 is not captured, even though an instance of the "a-MIDI monitor" plugin in the latter track shows that a note-on event is registered. Moreover, there seem to be some issues with note-off events not being registered correctly in the recording track for which I have failed to identify causal circumstances. Even though the input track contains a clean arpeggio, some of the notes (the same ones across separate recording attempts) are recorded as being held until the end of their next instance in the output track.
Steps To Reproduce	Create two MIDI tracks, and route the output of the first to the input of the second. Draw several notes in the first track, including one starting at time 0. Select the second track for recording. Rewind to the beginning. Start recording. Stop when the playback cursor has passed all notes in the first track. Expected: The second track contains identical MIDI notes to the first. Observed: The first note is missing. Some notes are also possibly held for longer than in the input track.
Tags	No tags attached.

Date Modified	Username	Field	Change
2017-12-27 02:14	negativezero	New Issue
2017-12-28 00:30	negativezero	Note Added: 0020112