Param Mod : Logarithmic Scale

[DarkStar]

At the moment, parameter modulation uses a linear scale to map the modulator (Audio, LFO, MIDI CC etc) onto the target parameter. This is not so good for non-linear parameters (e.g frequency)

For example, using MIDI Link modulation, to modulate an EQ frequency band between 1,000 Hz and 11,000 Hz requires a Baseline of 0.569 and a Scale of 0.34. And the 'half-modulated' frequency is about 3,300 Hz.

Wouldn't it be better if a logarithmic(?) mapping scale were used, such that the Baseline were 0.05 (= 1,000 / 20,000) and the Scale were 50% (= (11,000 - 1,000) / 20,000). And the 'half-modulated' frequency would be 6,000 Hz. That makes much more sense to me.

[Niall D]

Yes. I agree.
Also, an option to rotate the value. I mean, for example, if random is set and the value is going from 0.8 to 0.1 that it will increase upwards to 1, then jump to 0 and continue upwards. Rather than reversing

[ashcat_lt]

Audio detection actually is logarithmic. I guess maybe it’s “linear by dB”, but that makes it logarithmic on the pure amplitude scale. You can actually adjust the curve some, but I wasn’t able to get it to be perfectly linear. If you want it “log by dB”, you could probably get close enough for most things using that curve thing, though.

ReaEQ itself has an option to log scale automation, which might get you closer to what you want. For other plugins, you might need a second plugin between them to “translate”. It would be a fairly simple JS with one slider that you do the PM on and a second that “curvifies” that movement which you would then link to whatever you’re actually trying to control.

There is a whole thread around here about things that could be improved in Parameter Modulation, but the devs haven’t touched any of it in years.