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Did someone tested the geofex fake guitar generator? http://www.geofex.com/FX_images/Fake%20Guitar%20Oscillator.pdf

I have a SD1 modded for low gain as follows: - Better low gain control: DRIVE pot to A500K, R6 shorted (jumper). - Bit more volume at max: R11 shorted (jumper) - For better neck humbucker response (this reduces the final low end too): C2 from 18n to 10n.

Were you able to take a peak inside? Since they modify any variant, I suspect they may use their own PCB instead of component swapping.

I though of a way to do it with less relays: (Sorry for the horrible quality, I don't have my phone around so I used my webcam) This way the amount of SPDTs needed is a lot less. I didn't decompose the function, but it's basically L squared (5loops is 25 spdt relays. 8 loops is 64 spdt relays).

You mean like when all the effects are off? One effect off still means to route the signal from the effect before to the effect after. It still goes through the routing.

True by pass implies no buffers, but a direct cable from input to output, when the effect is off. That said, it would not surprise me if marketing would coin the term even when it does not apply. (there has been Class AB amps marketed as Class A, because of the term "Class A" thought to mean...

My calculations are that for 100% mechanical routing and switching one would need: [X = No. of loops] No. of SPDT relays = 2 * X * (X-1) + X 1 loop --> 2 relays 2 loop --> 6 relays 3 loop --> 15 relays 4 loop --> 28 relays 5 loop --> 45 relays I doubt that's what they are doing on the fender...

What's the expected VC? Avoid breadboarding the power supply. Usually the contact resistence on the breadboard is too high for the current spikes you can find in switching supplies.

this? Found it onlin, it's not verified apparently.

Similar threshold but different shape/slope. You will have a similar result using a red LED vs 3 silicon diodes. Or using 2 or 3 germanium diodes vs a silicon diode. Or even a germanium diode vs a schottky diode.

Oh, my bad then!

Hi, I'm new here and I just learned about this. Is the CV controlling an internal clock for the BBD emulation? Part of the BBD modulated sound is the aliasing, specially on slower clock speeds (the sampling frequency changes, but the antialiasing filter cutoff freq does not. Also the AA filter...

I always liked the SD1 asym clipping more, because of the fuller sound the odd harmonics give, and the dynamic response feels to me like having two pedals with different diode thresholds running in parallel. So I would suggest that (lots of pedals like the Timmy do this)

Just an idea I had reading the thread. You may even add a resistor for higher source impedance / SAG. Not sure, I'm not a fuzz guy. I've never seen this used in a pedal, so maybe there's a better way of getting the same result.

Intresting: do you have the pedal yourself?