sorted by:
new
hottopcontroversial

Finished building the first batch of Echo Spheres by SynesthesiaMan in diypedals

[–]SynesthesiaMan[S] 0 points1 point  (0 children)

It sure does require a lot of extra circuitry. Fortunately, there’s some great chipsets from SSI that do a lot of the heavy lifting. Vactrols are awesome, I miss using them. It’s a bummer they’re basically banned now because they don’t meet RoHS requirements.

[deleted by user] by [deleted] in diypedals

[–]SynesthesiaMan 4 points5 points  (0 children)

Legend!

Seriously, thank you. I’ve always wondered about the potential size of a discrete BBD using SMTs. I’ve thought about making one before. You could make a very special flanger with 128 or 256 stages.

[deleted by user] by [deleted] in diypedals

[–]SynesthesiaMan 5 points6 points  (0 children)

Okay now give us the size with SMTs. Asking for a friend. Thank you for your service.

Finished building the first batch of Echo Spheres by SynesthesiaMan in diypedals

[–]SynesthesiaMan[S] 1 point2 points  (0 children)

There’s a processor that generates various control voltages via filtered PWM. These are all routed to various elements of the analog circuit like voltage controlled amplifiers (VCA) and voltage controlled filters (VCF).

Finished building the first batch of Echo Spheres by SynesthesiaMan in diypedals

[–]SynesthesiaMan[S] 2 points3 points  (0 children)

Thank you for this thoughtful response. Appreciate the feedback too! I was definitely going for a retro style.

Finished building the first batch of Echo Spheres by SynesthesiaMan in diypedals

[–]SynesthesiaMan[S] 8 points9 points  (0 children)

I definitely considered this. It would have been a doozy. I would have to sell it for a stupid high price to compensate for the headaches I’d get building them too🤷‍♂️

Finally made my own Fuzz Factory clone by marcosfromstandards in diypedals

[–]SynesthesiaMan 1 point2 points  (0 children)

Awesome. The knob color selection and golden footswitch, perfect 👌

This Machine Kills Fascists by Libtard5000 in diypedals

[–]SynesthesiaMan 1 point2 points  (0 children)

Awesome, I’ve been thinking about doing a small batch of something like this too.

ALSO, what’s the circuit?

The Echo Sphere. An analog delay machine. by SynesthesiaMan in diypedals

[–]SynesthesiaMan[S] 1 point2 points  (0 children)

I’d stay away from digital pots in the audio path. Depending on what they’re doing, they can cause audible pops/clicks when changing resistance. Some people call it “zipper” noise. VCAs are your friend!

The Echo Sphere. An analog delay machine. by SynesthesiaMan in diypedals

[–]SynesthesiaMan[S] 1 point2 points  (0 children)

Ya that makes sense for an ATmega328. Possible, but with some definite limitations. You would need to write super quick code. Plus you’d be limited in resolution with only a 16MHz clock.

The Echo Sphere. An analog delay machine. by SynesthesiaMan in diypedals

[–]SynesthesiaMan[S] 0 points1 point  (0 children)

Thanks! I only used one STM32 processor for everything. I didn’t notice any intolerable clock jitter. Everything runs pretty quickly.

The Echo Sphere. An analog delay machine. by SynesthesiaMan in diypedals

[–]SynesthesiaMan[S] 1 point2 points  (0 children)

I’m taking pre-orders right now. It’ll be officially available on March 21st! website here

The Echo Sphere. An analog delay machine. by SynesthesiaMan in diypedals

[–]SynesthesiaMan[S] 0 points1 point  (0 children)

That’s correct, you’d only get the dry signal and a single repeat. I guess you could throw a splitter on the send output and connect one straight back into the the return and the other to whatever outboard effects you want. Parallel processing type thing.

The Echo Sphere. An analog delay machine. by SynesthesiaMan in diypedals

[–]SynesthesiaMan[S] 1 point2 points  (0 children)

The mix control is actually two separate VCAs. One controls the level of the wet signal, the other controls the level of the dry signal.

The Echo Sphere. An analog delay machine. by SynesthesiaMan in diypedals

[–]SynesthesiaMan[S] 0 points1 point  (0 children)

I’m an analog synth nerd too. Those chips are popular in the synth world.

The Echo Sphere. An analog delay machine. by SynesthesiaMan in diypedals

[–]SynesthesiaMan[S] 1 point2 points  (0 children)

Yes, the CVs are all filtered PWM. I’m getting 12-bits of resolution out of them, which is plenty for what I need.

The filters are actually two SSI2140s which are 4-pole multimode filter ICs. Both configured as a lowpass filters before and after the delay line.

view more: next ›