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#eurorack#overdrive#fuzz#silicontransistors#germaniumtransistors#nervepain#skyrats#pedalboardunfriendly
Recent posts
What this is, and what this is not: For now, this is not a platform to sell things, nor a place to intentionally hype things that, in the end, no one really needs. The idea is the space is to act as an educational/informational platform for things I am working to create, understand, and control. Much of this is approached from the angle of it being functional sculpture. I am not an engineer, but I am coming to understand that those tendencies are in my blood, and I suppose I have my family to thank for that (or maybe I just enjoy the way burning flux smells, for better or worse.) I realize that in 2023, there really isn’t anywhere left to stand *except* the shoulders of giants. Many of the things I am interested in exploring here have been iterated on time and time again, but after spending years standing in front of amplifiers, modular synthesizers, abstract paintings, et al., I can, at the very least, perhaps offer a new way of looking at and experiencing music technology, in perhaps a similar way that the Eames brothers challenged the perception of what furniture was supposed to be made of, or even function as (lofty of a goal as that may be)
The focus to begin with will be low to medium-gain discrete drive designs (with an emphasis on NOS/recycled/upcycled/surplus/salvage parts) That is not to say that I am ruling out anything IC based or beyond later on, I’m just saying you have to start somewhere, and these…primitive amplifiers were good enough for some of the greats, and that’s good enough for me, for now. If I’m being perfectly honest, all this keeps me from throwing myself out a window, so I’d be doing it anyway even if no one else knew, or cared, or paid any attention.
So if you stick around, there will be process, information, mistakes et al. Perhaps you’ll learn as I do. Maybe functional “guitar pedals” will emerge. Maybe we’ll stumble into something else. To quote a magic stretching dog, “sucking at something is the first step to being sorta good at something.”
20 May 2023
it seems the universe does not want a waveshaping mixer, or a waveshaper, or even just a mixer from me. it don’t matter. none of this matters.
26 Sep 2026
used parts galaxy run away. run around. run down?
28 Jul 2026
you win some, you lose some. after playing around with it for a while, i wasn’t super happy with the first version of this. it worked, but parts of it was hack-y, and some circuitry just didn’t perform as i had expected it to. so now it’s 2hp smaller, draws ~20mA less on both rails, sine instead of a triangle, noise instead of chaos, dropped some other functions entirely for the sake of optimization. works a lot better and i’m much happier with it overall. i know this concept won’t be for everyone, but i like the idea of something you can’t really set and forget. cv is cool, but you have hands too (usually. theoretically.)
14 Jul 2026
used parts galaxy: an aberration that i have been affectionately referring to as an “expressive voltage-influenced low frequency oscillator” (EVILFO) and it’s one of those “there is no way this is gonna work” things, and then it did, and now i have to deal with that.
the core is an integrator-driven master clock, which has a fixed internal frequency range that can’t be dialed in so much as.. nudged? (those familiar with cold mac’s location block will get where this is going..) as the control is turned cw or ccw away from noon, voltage rises (or falls) and the master clock begins to speed up or down in relation to the rate of change: the farther away from noon, in either direction, the faster or slower the clock will advance until it eventually stalls at either its fastest or slowest speed. if the knob is returned to noon quickly, it will halt the rate of change, and in this way you can “set” the speed of the device…sort of.
the rest of the nightmare flows down from there: the integrator output (+/-) is made available to the user, as well as the master clock (+) and a triangle derivative (+/-). the master clock triggers two discrete sample and hold circuits (one of which has a lag control ~2 seconds max) both of which are fed by taps of a sprott oscillator (which are also both available for use at their respective jacks). the s&h w/ lag influences a random burst generator that emits gates varying in pulse width and frequency, as well as a fixed-width trigger output. lastly, as i had a spare op-amp, a difference rectifier, which is a circuit i have come to love (and is the brainchild of andrew fitch, implemented here with his blessing) which takes the triangle and both s&h signals and looks at the difference between them and sends the negative difference to one output and the positive difference to the other.
in a way, this is like trying to walk your drunk buddy home from the bar. you can’t really carry him, but he can’t really get too far on his own either. i wanted to make something that was a modulator-disguised-as-a-controller that forces a user to grip and rip. voltage control, is like, *so* 2014.
20 Feb 2026
fight song revisited: an OTA SVF with…character, i guess. as someone who prefers additive synthesis, but enjoys the vibe filters impart, the idea was to assemble something that would put a little hair on otherwise harmonically anemic input material. the first version of this had different architecture and the whole thing just didn’t work. at all. so i started completely over, threw out 90% of it and tried again, which in the end was fine because this is quite a bit more interesting. FSR feat. a 2-ch input mixer, one ch at ~2x gain, followed by a variable (but never truly “off” asymmetrical saturation stage). with nothing inserted into the cutoff cv input, a normalization from the mix sum is connected for use as xmod (which sounds fun and weird as hell depending on input source complexity). LP, BP, and AP are available simultaneously for feedback experimentations. the resonance is a bit squirrel-y still, so i need to look at some value substitutes to see if that can’t be reigned in a little. the cutoff pot taper should prob be something different too, but otherwise, pretty happy with even if it is a bit unruly. if you want precision, buy a cwejman. someday i’ll make all this stuff available (and demo it, ugh) - i just thoroughly enjoy the designing/prototyping more than the grind of hand assembly, especially when TSSOP footprints are involved. #eurorack
11 Feb 2026
kill fix, a 4hp 2 channel performance mute, for cv or audio, with variable fade in/out times. will go from “click-y” to “soft mute” all the way up to “swell.” LEDs indicate state (off for muted, on for pass through) as well as fade timing. both channels have a reference voltage normalled to the inputs, so with nothing plugged in, each can act as a manual latched gate or ASR function. i did make a small goof on the normals, but easily addressed/kludged. will fix it properly on the the next revision.
28 Nov 2025
module no. 4: named after signs found in coastal regions warning beach goers about the level of aquatic risk, hazard flags is a quad gate module feature 4 levels of “hazard” (sonic quality) ranging from low hazard to “stinging marine life.” from top to bottom: vca, vc xfade, filtered gate (with switchable cutoff), “trash” amplifier (2 flavors via jumper setting) 10hp, 44mm deep, +18/-16mA (quiescent), all analog hand soldered smd. #eurorack
30 Mar 2025
module no. 3: “activate the corpses” is a simple 4 stage voltage utility module. i was frustrated that something like this didn’t seem to exist in the real estate, so i decided to make it myself. 4 stages of manually addressed voltages (jumper selectable between 0-5 or 0-10v per stage), gate output (5v) that goes and stays high whenever its stage is active, global trigger output (10v) goes high whenever any button is pressed and respects press duration. basically a compact take on a synapse-era programmer, with a trick or two. the name is lifted (with respect) from a combatwoundedveteran song. 10hp, 24mm deep, +4mA/-8mA, all analog hand soldered smd. #eurorack
13 Dec 2024
my second module design: “now i am you” is a dual probabilistic bi-directional (ab/y) switch. a single clock input flips both switches randomly, and each switch is/can be weighted against the other, so at extreme ends of the potentiometer throw, only one switch will flip. when external cv is applied, it overrides the manual control and the probability follows the polarity of the incoming cv. loosely inspired by a consumable item from elden ring, and the name is borrowed (with extreme reverence) from the brain of matt coplon. specs: 8hp, 40mm deep, +60/-55mA, all analog hand soldered smd. i accidentally used thru-hole pinout numbering for an smd transistor footprint, so i had to kludge that, plus the weight control is actually wired backwards from what i intended, so it needs another revision, but it otherwise works as expected, in case anyone wants to get weird. #eurorack
27 Oct 2024
hello, i designed a eurorack module. “fans & stoves” is a utility module that includes an attenuator, a symmetrical slew limiter (linear or logarithmic) a bi-directional half wave splitter/mixer, white noise source, sample and hold, vca, +5v offset generator, and a fixed threshold comparator. fans & stoves is named after a northeast florida antique shop that is/was run by some nice old ladies that had multiple seller’s stalls packed to the gills with all manner of bric-a-brac and sundries…which is basically what this is, a collection of tools for when you wish you had “just one more xyz” in your case. turned out really good if i do say so myself. specs: 8hp, 40mm deep, +32mA/-20mA (quiescent), all analog, hand-soldered smd. got a little more testing to do but then i’ll be able to build a batch (with aluminum panels) if anyone is interested. tell all yr friends, i got a plane to catch. #eurorack
14 Sep 2024
Still plugging away here! Seemingly unable to leave well enough alone, I decided that the tweederdrive could be done better on a couple levels: one of the clipping options was removed, opted for a different (smoother) transistor and added a secondary re/voicing option that leans more towards “fuzz” I suppose, so think of it now as two different drives in one box, selectable with the flip of a switch. The biggest change really though is being completely over off-board wiring, that shit is for the birds (womp womp) - So I finally got my act in gear and tried to figure out how to do as many pcb mount things as possible, which hopefully will reduce build times in the future and reduce the amount of possible antennas floating around inside these things. This thing is also now called (in homage to Chris Norris) Black Seagull (Crow), since JAM pedals already have a box called Seagull.
Also decided to rework Seaglass, mostly to accompany silicon transistors over germanium, but (hopefully) still retaining the cool parts about the germanium response and (again, hopefully) without the hassle of matching and sourcing - more on that later.
I was gonna build out a new Black Seagull proto this weekend, but it seems I pinched some nerves in my back by just existing, I guess, so no drilling and desk hunching for this idiot.
#overdrive #fuzz #silicontransistors #germaniumtransistors #nervepain #skyrats #pedalboardunfriendly
30 Mar 2024
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