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Please note: This is a kit and requires assembly.
The ECHO is a compact voltage-controlled echo/delay comes in the very tidy size of 4HP and is certain to be one of the best bangs for your buck.
A very unique echo using the PT2399 IC featuring Voltage Controlled Rate. Manual controls for Rate, Feedback, and Mix. Beautiful and bizarre, CV modulation of the rate brings in ghostly pitch bent sounds to metallic reverbs. An effects module that everyone needs in their rig.
ECHO Rate CV accepts -5 / +5 voltages (although the negative range is almost -7)
ECHO Rate knob is setup to push the chip into extreme territory and will extend past the "useable" range of the PT2399 IC, meaning that once you turn the knob past 3 o'clock or so, the chip will stop operating and you'll only hear your dry signal.
Attenuation, attenuversion, or using an offset will greatly help when running voltages into the Rate CV input. This way, you can tailor the modulation as you see fit. You will absolutely get the most out of your ECHO by using modules that attenuate, invert or offset your signal.
Product info:
- Power Draw: +40/-20mA
- Rate range: 30-190mS
- 4HP
- Voltage-controlled rate
- Self-oscillating feedback
- Mix control
Diana Wiegand
2025-09-06 17:55:36
More of an intermediate kit, but fun to build. Sound is surprisingly good (due to the PT2399 BBD chip) and the voltage control works well into glitch territory.
Customer
2025-07-07 12:35:19
The module itself sounds great and can perform many effects and functions. I love making glitchy sounds at the lower edge of the delay's capabilities. It's also fun to put a sequencer into the echo rate CV. You can also crank up the feedback and get some gnarly distortions. Fun times all around.In terms of the kit, it was fairly straightforward and fun to build. Only caveat was that one of the resistors included my kit was the wrong value! I called up Synthrotek and they were able to diagnose the problem and point out which resistors were the wrong value. Very helpful guys, over there! I've always been impressed with their customer support.So just make sure to double check the values of the included components with a multi meter to make sure they've included all the right parts. This should probably be a standard practice with any kit, as I have now learned!
Marc
2025-06-10 19:57:15
Easy build, AWESOME Module!... Great for beginner DIY'ersDid it in one night, about 3hrs, on and off.
Uncle Buck
2025-01-05 10:30:22
I only have basic analog modules, so I've been really wanting an effect module to try with them. I built this echo tonight and have been checking out its sounds for hours. It's pretty freaking great! I've been watching videos of people demoing it now that I've had a go at it and nobody seems to be showing the "magic wand" and classic space sounds it can make when you try different sweeps on the "Rate-CV" input. I'm pretty sure that most of the sound effects and music in the Original Star Trek series can be replicated from this module and little more.At first I thought it wasn't working, but with enough trial and error, it started to turn my random beeps and boops into a roomful of beepers and boopers seemingly playing their own imaginative notes. The biggest discovery was realizing that the echo is faster where "Zero" would be, and so using the negative output of my ADSR into the rate input and a lot of feedback, it starts making that characteristic sound of a magic wand, or "fairy tail scene change" sound. The negative voltage curve seems to bring the echo rate down - which is counterintuitive - but gives a nice harp-like strum.Of course all this trial and error are necessary because the kit only came with a color parts lay-out. No instructions. If there were instructions, the trial and error would be necessary due to ignoring the instructions though, so not having to see a bunch of words seemed to improve the build experience, since I was also listening to a show at the same time. Most surprisingly, each part was arranged in order on the ammo belt-type tape, according to their position on the color parts lay-out sheet. That must have taken an unreasonable amount of work, yet the kit is actually pretty cheap for its relative strength. It's only 4HP, and I'll probably end up buying a second one for stereo effects.
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