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IDProjectCategoryView StatusLast Update
0005002ardourbugspublic2012-07-10 16:02
ReporterBenSpector Assigned To 
Status newResolutionopen 
Target Version3.X 
Summary0005002: Trim automation changes level relations (Linear)
Descriptionif you have an automation lin of 0.0 db, And in it a step of 0-X db, and you will drag it down, the range between the lin and the step will get bigger then the original X.
See movie.
TagsNo tags attached.


2012-07-10 11:24



2012-07-10 13:01

administrator   ~0013833

i don't understand what the issue is here.


2012-07-10 13:52

reporter   ~0013834

Let's say I have an area where the level is 0.0 db with a small step down in the middle of -3 db.
Then I range select the area and trim it down a bit.
I would expect that the 3 db difference will not change.
In Ardour it will grow.


2012-07-10 14:09

reporter   ~0013835

See attached movie.

2012-07-10 14:10



2012-07-10 14:17

administrator   ~0013836

ok. this happens because the mapping between the GUI and actual gain coefficients being non-linear. 2 pixels at the bottom of a fader automation track is a different number of dB than 2 pixels 3/4 of the way up.

its a bit of a problem to fix because when moving individual points this difference is very desirable, so that moving control points has the same non-linear feel as moving the fader itself.

i'll give it some thought.

Issue History

Date Modified Username Field Change
2012-07-10 11:24 BenSpector New Issue
2012-07-10 11:24 BenSpector File Added: Screen Recording
2012-07-10 13:01 paul Note Added: 0013833
2012-07-10 13:52 BenSpector Note Added: 0013834
2012-07-10 14:09 BenSpector Note Added: 0013835
2012-07-10 14:10 BenSpector File Added: Screen Recording
2012-07-10 14:17 paul Note Added: 0013836
2012-07-10 16:02 paul cost => 0.00
2012-07-10 16:02 paul Target Version => 3.X