Slowly open filter with LFO


I want to slowly open a synth track filter with a LFO. I want the filter to go from 0 to fully open during 64 steps. Tried a lot of waveforms and step combinations, but no lucky…

Any hints ?

Don’t have a DN, but on other devices you would …

Select Ramp LFO shape
Set to Free Mode
Set factor of speed x mult to 128/8 (16)
Set Filt Freq low
Target LFO to Filt Freq
Enable a single LFO reset(retrig/restart) using a p-lock with a 1st TRC condition on step 1 (assuming same functionality as other boxes for resetting LFO phase)

The LFO speed is 128 for a normal shape over 1 bar, so divide by 4 for 4 bars and half half again for using only the first half of LFO shape - can also be a Tri shape (if no ramp available) if you divide factor by 2 again to get a quarter of the shape over 4 bars

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For a different flavor, couldn’t you use the exponential LFO shape and set the speed to a negative number? As I recall, there’s a way to make the LFO go in reverse. Anyway, that would preclude the need for the extra speed division. However, I do like that idea of working with LFO timing to achieve different results.

As an aside, with various tweaks to the filter envelope, couldn’t you also use that to achieve the desired result? long attack, zero decay/sustain/release. Adjust the attack to get desired result.

Ah - but using the envelope, it would get triggered every time. Nevermind. I kept thinking of it with respect to a pad sound that only gets trigged once. In which, case the envelope could work too, I suppose.

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you could disable the filter trigger except on the first note using parameter locks