Moog Music Forum

With the new CV functionality, I've tested how M1's modulation signal looks like.
What you see below is oscilloscope screenshots of LFO1 set to a square wave. Notice that there is a substantial amount of smoothing applied and the square wave doesn't exactly look like you would expect. For comparison, the first screenshot includes a square wave coming from an analog LFO on a modular synthesizer.

red: Moog One LFO1 square wave at 5Hz
blue: square wave LFO on a modular synthesizer

Moog One LFO1 square wave at 10Hz
Moog One LFO1 square wave at 25Hz
Moog One LFO1 square wave at 50Hz, notice the loss of amplitude for anything above 25Hz

Moog One LFO1 square wave at 100Hz, the amplitude is only at half-range
Moog One LFO1 square wave at 150Hz, the signal becomes distorted. Moog One LFO1 square wave at 150Hz, a close-up

It looks like this heavy filtering has only been applied to the CV output and not to the modulation signal in the Mod Matrix.

red: CV output: This is a close-up of Moog One LFO1 square wave at 5Hz,
blue: audio output: the same LFO modulates OSC1 Mixer, notice a 3ms delay, but also a much sharper square wave.

In case you think about using M1 to process external CV, unfortunately the incoming signal will be filtered as well.

red: a square wave from an external analog LFO @16Hz
blue: the same square wave going through M1. (CV IN > Matrix > CV OUT)
red: M1 LFO1 square wave from CV OUT1
blue: the same square wave looped back through M1. (CV OUT2 > CV IN > Matrix > CV OUT3)

Very cool representation, thanks!!!

So, is this something physical or can it be normalized with code, eye for an eye type of thing, which I imagine is what we would like to see/hear?

Also, I'm looking around for an oscilloscope, what model are you using, suggestions?

Thanks!!!

I have Tektronix TBS2072, 2 channels, a huge screen and no fan.