View Issue Details

IDCategoryLast Update
0006759bugs2016-03-08 19:14
ReporterotottoAssigned To 
Reproducibilityalways 
Status newResolutionopen 
PlatformToshiba Satellite A200-10ZOSKXStudioOS Version14.04.2
Product Version4.4 
Fixed in Version 
Summary0006759: Fader automation edit from 0 to 1, not corresponding to value expressed in dB (Ardour 4.6)
DescriptionIn fader automation on a track. When double-click on the blue fader-bar and enter the value from the keyboard, you can enter any between 0.0 to 1.0.
When 0.0, then the bar goes to -inf. dB.
When 1, then the bar goes to 0 dB.
When 0.5, then it's -6,02 dB
etc.
TagsNo tags attached.

Activities

nabero

2016-03-08 06:51

reporter   ~0018046

Another example is calf eq's plugins.

Levels for shelves is expressed from 0.015625 to 64, centered in 0.
The values in dB ranges from -36.1 to 36.1.

x42

2016-03-08 14:05

administrator   ~0018048

> When 0.0, then the bar goes to -inf. dB.
> When 1, then the bar goes to 0 dB.
> When 0.5, then it's -6,02 dB

That is perfectly mathematically correct.

For numeric entry or a spin-box: How would you go all the way down to minus infinity? Using the coefficient makes a lot more sense.


As for calf, that smells like they shoehorned things for midi (127 steps), nothing we can do about.

ototto

2016-03-08 14:25

reporter   ~0018049

That is perfectly mathematically correct.

    For numeric entry or a spin-box: How would you go all the way down to minus
    infinity? Using the coefficient makes a lot more sense.


Of course it's mathematically correct, but it seems odd to me that you need to calculate log10 in mind. As for -inf, what you say makes sense. As for any other value - it does not IMHO. Plus, to keep some order, editing the value of a single key point on automation curve should be done the same way. Lastly, I didn't even think it's made that way on purpose. Your decision :)
O.

mhartzel

2016-03-08 19:14

reporter   ~0018052

In my opinion if Ardour itself shows a specific value in dB, then the user input should also be in dB's. Anything else causes confusion :)

You can input dB values in audio track volume faders, but the audio track volume automation lane fader requires the user to input to be log10 values.

By the way what do you input, if you want the automation volume fader to go to -12.75 dB. Its 0.230409309 :)

Issue History

Date Modified Username Field Change
2016-02-01 08:36 ototto New Issue
2016-03-08 06:51 nabero Note Added: 0018046
2016-03-08 14:05 x42 Note Added: 0018048
2016-03-08 14:25 ototto Note Added: 0018049
2016-03-08 19:14 mhartzel Note Added: 0018052