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Invert "log" and "exp" scale names?

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creal
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Posts: 93

Invert "log" and "exp" scale names?

Post by creal » 15 Dec 2022, 10:27

Hello,

I have a simple question: why do log/exp scales are programmed with values on X-axis and input on Y-axis?

When I choose "log", I expect a function that gives high values when I move the fader a little bit, then a small amount of values are spread across the rest of the fader.

All other audio softwares (but it's also mathematically logical) that let the user choose a log/exp curve are programmed with the input on X-axis (MIDI keys, MIDI velocity, etc.) and the output on Y-axis (cutoff filter, volume, etc.), which corresponds to f(x) in the mathematical language. In the case of Usine, the fader/knob cursor is the input and the values are the output.

It's counter-intuitive, isn't it? The idea would be to invert the "log" and "exp" names.

Not a big deal, though. I thought there might be a reason hidden under the hood.

creal.

oli_lab
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Post by oli_lab » 15 Dec 2022, 20:03

As long as the order of the functions that appears on the list is not change (linear, log, exp) , the names could be simply changed to become (linear, exp, log) for compatibility sake.
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senso
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Post by senso » 20 Mar 2023, 13:52

not really.
in log mode, small changes on low value will give big changes on the result. It corresponds to the log curve:
Image
But you're right, it's just a mater of point of view.
I think that it's too late now...

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