0007786: "Duplicate Region - Fill Track" does not align exactly at beat raster

ID	Project	Category	View Status	Date Submitted	Last Update

0007786	ardour	bugs	public	2019-08-13 11:50	2021-06-12 13:22

Reporter	tomade	Assigned To
Priority	normal	Severity	minor	Reproducibility	always
Status	new	Resolution	open
Platform	Some Other Linux	OS	Some Other Linux	OS Version	unknown
Product Version	5.12

Summary	0007786: "Duplicate Region - Fill Track" does not align exactly at beat raster
Description	Hi when using the duplicate region -> fill track tool and the region has an exact length of a beat, the fill track tool leads to an error in position of the duplicates (see picture). The duplicated regions are not aligned to the beat raster anymore. This error is accumulative. The longer the track the bigger the error. Kind regards! tom
Steps To Reproduce	see description
Tags	fill track

tomade 2019-08-13 11:50 reporter	Bildschirmfoto von 2019-08-13 13-49-34.png (197,088 bytes) Bildschirmfoto von 2019-08-13 13-49-34.png (197,088 bytes)

x42 2019-08-24 02:42 administrator ~0020736	NIce example! This depends on BPM and sample-rate. Audio-region duration is counted in audio-samples and currently limited to that unit. One beat at 44.1kHz, 127 BPM is 44100 [samples/sec] * 60 [sec/min] / 127 [beats/min] = 20834.64 [samples/beat]. There are no fractional audio-samples, so Ardour rounds this down. Hence every time the region is duplicated, 0.64 samples are lost compared to the beat-grid. Fixing this requires various parts that are planned for Ardour 7 (some preparations are in the nutempo git branch). e.g. the region duration needs to be set in music time -- exactly to 1 beat (not 20834 samples).

consint 2020-09-23 14:08 reporter ~0025052	I have the same error with midi regions in Ardour 6.3. ardour_midi_not_in_grid.png (146,047 bytes) ardour_midi_not_in_grid.png (146,047 bytes)

Date Modified	Username	Field	Change
2019-08-13 11:50	tomade	New Issue
2019-08-13 11:50	tomade	Tag Attached: fill track
2019-08-13 11:50	tomade	File Added: Bildschirmfoto von 2019-08-13 13-49-34.png
2019-08-24 02:42	x42	Note Added: 0020736
2020-09-23 14:08	consint	File Added: ardour_midi_not_in_grid.png
2020-09-23 14:08	consint	Note Added: 0025052
2021-06-12 13:21	x42	Relationship added	has duplicate 0004102
2021-06-12 13:21	x42	Relationship deleted	has duplicate 0004102
2021-06-12 13:22	x42	Relationship added	has duplicate 0008740