track out of sync after overview seek, quantisation on.

[mixxxbot]

Reported by: daschuer
Date: 2018-01-02T23:13:49Z
Status: Invalid
Importance: Medium
Launchpad Issue: lp1740958

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If you enable quantisation,you can start a track in sync with a playing track.
If you now seek the track with there is always the same small offset (double base) between both tracks.
If I disable quantisation I get a random offset as expected.

It would be also cool, if we not just sync the beat but also the bar.
How about using a n x beatjump length?

[mixxxbot]

Commented by: johanLsp
Date: 2018-01-14T15:10:55Z

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I couldn't reproduce this.
I loaded 2 tracks with quantization enabled and tempo synced (but not locked), and moved around both tracks using the overview panel : beats stayed synced throughout.

There's though an issue with effects using quantization (Echo, Tremolo), which are getting out of sync when moving manually through a track.

Anyway, being able to move by a multiple of n beats (4 seems right, maybe 8) could be useful to stay rhythmically synced.

[mixxxbot]

Commented by: johanLsp
Date: 2018-01-14T15:53:26Z

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My bad, there's indeed a small offset after moving around

[mixxxbot]

Commented by: Be-ing
Date: 2018-03-19T13:25:31Z

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I suspect that fixing this will require risky changes to how quantization and track transport are handled, so I'm retargeting this to 2.2.

[mixxxbot]

Commented by: daschuer
Date: 2018-11-11T20:34:33Z

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Interestingly I cannot confirm this with Mixxx 2.1.5.
@johan: are you able to reproduce this with this version?

[mixxxbot]

Issue closed with status Invalid.