Strange Module Interactions

video upload by Bata

This one reminded me of the sequence ratchet/rachetting effect in the recent Franke and Ruby and “Liar, Liar, 960 Denier!” 😅 videos, albeit a diffent approach.

"Showing some strange interactions between a few Behringer modules.

Reddit user n_nou offered this explanation.

'Ext Adv expects bipolar clock to cycle properly. Any polarity dip will do, even slightly below zero at minimum. EOC on Abacus is (mostly) unipolar. Mostly, because the exact 0 point varies depending on the function shape, so some shapes and frequencies run 1050 through only odd and some through all steps. Simple offset will correct/result in this behaviour and you can use any LFO for this, this is not specific to Abacus. Moreover, Ext Adv is not properly buffered, you can literally use it as a half wave rectifier. Just mult the signal to the Ext Adv and your destination, 1050 will sink the negative part of the wave and will mess up with unipolar outputs. Check unity output from Abacus, it flattens at maximum.

As to PP1, at high gain it will amplify even miniscule fluctuations in power supply, and since PP1 itself is very sensitive, it will result in pitch shifts.'

Not sure if this is telling the whole story or not but it's all I have to go off of at the moment."