Spectron mod question: "sweep range"?

[Itchy Scratcherson]

Can anyone provide an ehx Riddle Q-balls *schematic*? This may be a super-simple matter, but I'd love aion's Spectron to have the capability to specify the sweep frequency range with just a little more precision. I haven't seen this on other envelope filters, but the ehx Riddle Q-Balls "START" pot sets the frequency that the sweep starts at (~40Hz-to-3kHz), and it's "STOP" pot sets the frequency that the filter sweeps to (~80Hz-5KHz).
Where on the Spectron would such filters be added?
Also, if anyone has experience with that and finds it useful or not, please let us know. It may be one of those ideas where the concept is more impressive than the implementation.
Thanks!
~Christopher

 

[eh là bas ma]

Hello, welcome.

Unfortunately I can't really help you with your request, but i know Aion is often on diystompboxes.com. You should also post there, i guess.

I use the Range rotary switch for the frequencies, and fine tune with the knobs and switches. But it takes time to know and use all controls efficiently.

I would also be interested by a mod with a 12th control on this circuit. As crazy as it may seem, I am sure it could be useful. I hope to read more about this.

 

[Itchy Scratcherson]

Thank you for the reminder to post on on diystompboxes.com!
I think I found my answer in Mark Hammer's article: "The Technology of Auto-Wahs / Envelope-Controlled Filter". His section labelled "The Envelope follower and Inverter" pinpoints the details I'm looking for.