Hello - This is my first post. I've been using Pd for a few years, but mostly on the GEM side of things. For about a month or so I've been tinkering with synths, reading and following along with tutorials, making notes, branching off into different ideas. I had the idea of a multi-oscillator additive synth, where several oscillator modules will be added to each other in sequence. The guts of each module are attached:

2oscadditive.pd

Here, two frequencies are summed, with the second frequency is the first one multiplied by a +/- 1 octave range. Lots of fun, especially with low frequencies. I've always been a knob-twiddler, so I have this (and a volume control above the dac~) set up to work with an ancient MIDI controller. However, I would like to be able to "sweep" the second frequency in "real time" while the summed frequencies are audible. I've been staring at this thing for a couple of hours now, and I can't seem to figure out where I need to go with this. Any pointers?

Thank you!

@arratik Hi and welcome to the forum. To hear the sweep you need to change the second oscillator's frequency every time you change the scaling parameter, right now it's only changing the "cold" inlet of the multiplication, and the frequency only changes whenever you trigger a new key. [trigger] object lets you first set the new ratio, and then it triggers the new frequency. Hope this makes sense.

2oscadditive_sweep.pd