Yes, a pot could be replaced with various resistor-switch combinations and/or an internal trimmer.
Gain would be a good example. Two resistors and a three way switch could let you have low, med and (no resistance) full gain. Depending on the switch you could change that no resistance to some if the circuit required it
Same could be done for EQ points, convert a tone-pot to bass, flat, & treble settings, or a two-way toggle of just bass / treble;
"optimising" the pedal for a "bass or guitar" switch by swapping out capacitors with the toggle...
It's my understanding that these are the Grizzly's controls?:
- Clean Boost
- Overdrive
- Distortion
- Mid-Scoop
Nothing there that couldn't be replaced by a switch. 'Course, not many people would sub out a volume pot for a switch; just 'cause it can be done doesn't mean you should do it.
No-pots effects:
Roland Dimension D / Boss DC-2 Dimension C and its clone the Behringer CC300 / TCE Third Dimension
Mr EQ:
"
This project comes from guys at RunOffGroove.com and offers 12 different sounds with three switches.
Each switch is assigned to one frequency peak: 100Hz, 700Hz and 2.1KHz.
Bass and Treble switches provide 7db boost when activated and Middle switch can also do 7db cut. This is very useful for guys who like scooped mids and it offers two different modes: with both Bass and Trebble off it gives mild scoop, but with Bass and Treble on and Middle cut it gives more dramatic mid scoop. "
I'd change that last Mr EQ switch's frequency to 12ooKHz, and throw in a stomp switch — would make for a great instant slap-tone pedal, kinda like a CAL Funkulator.
No knob, just a switch:
A knobless delay all buttoned up:
Dan Armstrong switch-hitters:
There's a few more knobless pedals out there, such as Henretta's little line of no-knobber-jobbers with only internal trimmers...
More No-knobbers:
Boss PSM-5
Catalinbread Zero Point
Union Tube & Transistor's BumbleBuzz
Blackstone Mosfet Drive
Mad Professor Simble
EQD Tentacle
Bigfoot Engineering Octo Puss
etc
etc