speedo

I am in the process of building a little synth. I have a number of common things on it like filter envelope, and other modulations. One part I am having trouble with is making the filter LFO and envelope smooth in response to change. For instance, I have my LFO controlling the filter cutoff but every time I manually tweak the cutoff control the filter jumps from where it was in the modulation to the new setting - and this creates an audible click. Any thoughts on how to scale these things so that they transition smoother?

updating-parameters-as-they-modulate-without-clicking

you can create smooth ramp with the [line~] object.

That was my initial thought. But consider that the LFO has modulated the cutoff all the way down to 100hz. Meanwhile, I grab the control which is at 4k. Even with a ramp that smoothes the transition over 10ms (so that it doesn't click) the filter will still jump all the way up. So how can I grab the cutoff control without ruing the flow of the LFO?

Utilising dual controls in this way means that there will have to be some transition between two values: where the LFO-modulated cutoff is and where the user value is, and of course vice-versa. Stated colloquially (I'm not at Max at the moment) your algorithm should do this:

What is the current changed user value (X)?

[line] or [function] would seem applicable here, but also look at [sah~] in the signal domain. It should allow you (somehow?) to pass the user value only if the LFO value is the same.

What is the current LFO value (Y)?
What is the current changed user value (X)?
goto (X+Y)/2 in ?ms
goto X in ?ms

Updating parameters as they modulate (without clicking)