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hi all, i'm working on my first unique(ish) design -- it's an adaptation of the keeley rotten apple (pedalPCB sour grape), which is itself an adaptation of the EHX op amp big muff (pedalPCB dream fuzz). the input, sallen-key and clipping sections are largely the same, then i've added a tone...

hi all, i'm interested in the idea of adding a clean blend to an existing distortion effect, and i'm wondering if it's possible to also use it as a switchable buffered bypass option. with the help of this very useful tutorial by @jesuscrisp...

hi all, i've been playing around with the sour grape (keeley rotten apple) circuit, which is based on the op amp big muff ("dream fuzz"). so in comparing and contrasting the two, i noticed something interesting about the original op amp big muff -- the clipping stage op amp is biased by a...

hi all, i'm just about finished building my pandora's box with a couple of mods -- i added the CB bass mod, and borrowed the "drive knob" mod from the aion dynamo, which replaces the two switches with a B1K pot and 240R fixed resistor, for a variable resistance of 240R to 1.24K, a greater range...

hi all, i'm in the process of designing a phaser with switchable stages and from most of the circuit designs i've seen it seems like people generally try to avoid feedback for 2-stage phasers -- the MXR phase 95 and pedalPCB XC phase just put the feedback control after the 2/4 stage switch so...

So the version of the Expandora that I want to build is essentially the same as the Aion Effects Dynamo, with the two switches replaced by a "Drive" knob instead. And I think I want to add the Bass Pot described in this thread as well (instead of the bass switch on the Dynamo). Since I was...