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I've noticed some high frequency cut on my recent Terrarium build. I believe it is due to C7 (1nF), when used without a buffer before it. It looks like C7 acts with the guitar pickup to create a low-pass filter. Using a buffer before the Terrarium eliminates the high-cut. I'm aware of the...

Very nice. Where did you get the light blue hammer enclosure?

I'm working on a project ingetrating 2 FV-1 based pcbs in a single enclosure. This is for a someone in a studio application so I'm trying to make sure the noise floor is minimal. I'm considering these options: --18V IN, 7809 regulators (the big ones) with appropriate capacitors. --9V IN, use...

Maybe try connecting the - side of the 10uF cap to gnd, to see if you get a lot of gain that way. (It would simulate max gain knob). Then you can start to pinpoint if it’s a problem with the pot or wiring, or something in the circuit

Jcpst, I’ve got parts coming for the terrarium and that octave you posted about (by Steve Schulteis) will be one of my first things to try. I liked your points, especially about latency, hadn’t quite thought of it like that. The main issue with fv-1 pitch shift quality, as I understand it...

^it's pin13 for the internal rom, just for future reference.

No, it's a small pitch shift (detune), not transpose or octave. You've already messaged me a couple times asking for custom octave code, and I sent some code over. At that point it seemed like you wanted me to spend a lot of time writing code for you, and I don't think the FV-1 can do what you...

That looks sweet!

Dung Beetle is super cool

If you mix before the iridium, then the cab sim (most importantly) as well as amp sim and reverb will be on your external audio. So, better to take the output of the iridium into a mixer. I've built both of these and they work great. Caveat is for the mixer you probably need to split the L/R...

Very cool. Yeah a 500k across the volume would do it. The 763 circuit is pretty similar to the Timmy, but the HPF is set at a higher frequency (where it cuts lows, unless the lows knob is turned up) (R3 and C1) A trick you could take from the Timmy is 2:2 diodes instead of 1:1. This would...

Sometimes parts are bad, and sometimes the breadboard tracks can wear out and not connect to your part leg well. You can test those two possibilities if you have extra parts or extra space on the breadboard. In my experience, it usually comes down to a mistake I made though. You could post your...

That IR link is cool. I did a quick test with a 3.5" driver from an old, keyboard. I drove it with the L channel of the headphone jack of the pedalpcb headphone amp (LM386 like the ruby). The speaker is not good and cannot get very loud without distorting. However, I was still able to...

The pedalpcb headphone amp is really handy, especially with the phase switch to spread the sound and feel more immersive. But I definitely don't like the sound without any cab-sim. Clean sounds thin and distortion sounds quite harsh. (Although the 424 -> DI thing has some popularity at the...

Overthinking for sure. The Ruby build looks cool. I'd be curious to hear the difference between: Ruby -> 3.5" Ruby -> 12" Cab Sim (or EQ) -> Ruby -> 3.5" Not that you have to report back, just thinking. I wonder if the cab sim would help the 3.5" sound more guitar-like, especially with...

Just saw Cybercow's, he covered some of the same things. My understanding is an active 2nd order filter will be steeper and more defined than 2 cascading 1st orders filters, I'd guess better for your application

Rin and RL depend on the impedance of whatever is before and after. Ideally you assume 0 for Rin if a buffer or active pedal (with low outpu impedance) is before it, and 1M for RL, as most pedals and amps have 470k~1M input impedace. But, if you're putting this first in chain (connected...

I have some questions about speaker size kicking around and haven't found many satisfactory answers online. I thought I'd open it up here. Lots of generalizations for the sake of discussion. Small practice amps often have 8" speakers. I've read people say that when they plug into a 12" cab...

Tentacle is the same circuit as the green ringer. Digital octave shift is difficult to pull off really well. My hunch is the Lekato would be the “simple method”, which has some noticeable latency and a warbly tremolo type artifact. Pedalpcb Pythagorus with EEPROM builder has a patch that...

The parallel octave->fuzz paths sounds like a cool idea to try out.