Quaverato Harmonic Tremolo Pedal

(6 customer reviews)


NEW! Improved! Now with SILENT SWITCHING

Quaverato Harmonic Tremolo Pedal  combines many features to make a great sounding, versatile, and practical stompbox. Available as a DIY KIT or Ready-to-Play. Full MIDI implementation available as a kit option; standard with Ready-to-Play.

  • Digitally controlled, all analog signal path combining maximum flexibility with great tone.
  • Both Traditional (In-Phase) and Harmonic (Out-Of-Phase) Tremolo modes
  • Up to 15dB of gain
  • Modulates the high and low frequencies independently for dynamic swirling effects
  • Extra internal controls allow for custom crossover frequency selection and individual HIGH and LOW signal path volume adjustment, for full tonal control
  • Bypass footswitch can be used as either a toggle or momentary switch
  • Plus all the usual:
    • LFO wave shape, rate, depth and spacing (aka wave form shift or duty cycle)
    • Tap Tempo footswitch and multiplier selection
    • Relay controlled, true-bypass switching with Click Suppression for Silent Switching
    • MIDI implementation gives remote control over every feature



SKU: QUA Category:


  • Harmonic or Traditional tremolo
  • Harmonic Mix allows the HIGH and LOW frequency bands to be modulated independently
  • Adjustable harmonic crossover frequencies and individual volume controls for the HIGH and LOW signal paths for tonal control — the Quaverato can be adapted for use with guitar or bass
  • Relay-controlled true-bypass SILENT SWITCHING
  • Boost up to 15dB
  • Tap time with multiplier: 4:1,  3:1,  2:1,  1.5:1,  1:1, .5:1
  • Footswitch can engage the effect either as a toggle or as a momentary switch
  • All the usual LFO waveforms and controls: speed, depth, shape, and spacing (aka waveform shift, or duty cycle)
  • Full MIDI implementation standard on built units; optional with DIY kit
  • Sturdy 18 gauge steel enclosure
  • Robust polycarbonate label
  • Open source software so all you hackers can customize your tone!
Finish Galvanized steel
width 5″ (12.5 cm)
depth 4-3/16″ (10.5 cm)
height 2″ (5 cm)
weight 21.5 oz = 1.34 lb (600 g)
POWER REQUIREMENT 9V DC center-negative power supply, 60 mA

6 reviews for Quaverato Harmonic Tremolo Pedal

  1. Scott strange (verified owner)

    My unit was quickly shipped to Canada. Was very impressed with the thoroughness of the instructions and kit layout. Great design, easy to build, took me a few hours. Plugged it in first time to no effected signal, but discovered i had the DIP switches all off, so quickly got it working. Very versatile trem, great quality, beautiful look, great sound. Love the momentary mode, the soft touch relay switching. My only two issues were the color of the display LED’s, which i found look christmas-ey with the red/green so i changed mine. Also, i think having the volume control is a drawback, as i dont use a tremolo as a boost, i use a boost as a boost, so finding and mainting it at unity gain is rather a headache. I will probably find the right spot and glue it in place or disconnect the pot and put a trimmer inside.
    Would recommend using rotary switches for the multiplier and wave shape controls, but thats just my preference.
    Otherwise, incredible stuff you guys. Love it.

  2. germanrobledo

    Purchased the DIY Kit.
    Shipping: Arrived within a few days to California. Well packed.
    Packaging: Arrived with all parts in perfect shape. Separate plastic baggies for different part types.
    PCB: The board is layed out nicely with plenty of room. Labels were clear and easy to read.
    Parts: Good, quality parts.
    Instructions: Some of the best I’ve seen. Every step is clearly explained and illustrated. The demo video answers a lot of questions.
    Product Support: I asked a question on the forum and got a prompt reply from Brach.
    Finished Product: I was very happy with the results. Handsome looking pedal built like a tank. The sounds were very consistent with what you hear online. Versatile and pleasant to the ear. I just finished the build last night, so I haven’t played through it for more than a few minutes. I liked what I heard.

    Highly recommended. I found a 10% discount code in the March 2019 Premier Guitar magazine.

  3. pciccimaro (verified owner)

    Great Kit. Ordered this as a DIY Kit. Instructions were VERY easy to follow and precise. Pedal looks sharp and sounds great. Any questions I had, Brach answered quickly and informatively. Can not wait for their next DIY Kits!!

  4. Rusty Sterling

    Great pedal and instructions. This pedal is studio-grade quiet both engaged and in bypass. Very happy with it. And I cannot say enough about the support and forum here at ZDL. I got clear responses to my questions and immediate and quick support for a missing part. I plan on eventually building The Percolator kit. Looks like a fun little amp.

  5. Brian (verified owner)

    Most importantly, this pedal sounds great. Seemingly endlessly tweakable but at the same time easy to dial in all kinds of great sounds from subtle to whooshey phasey crazy. The harmonic trem I find particularly pleasant and unique.
    I purchased the kit and the instructions are easy to follow, I had no trouble getting it put together. I have some experience with guitar wiring and such but had never done a pcb before, easy peasy. If I can do it, so can you.
    The customer service was prompt and excellent.
    For what you get, I feel like this was a really great value. A little time putting it together, I learned something new, and you end up with a really great quality unique pedal in the end.

  6. keefer roberts (verified owner)

    I’m comparing my recently self-built Quaverato to the tremolo (“Vibrato”) on my 1961 Fender Super, and the Quaverato sounds fantastic! Very authentic. I like both better than my Magnatone with true vibrato. The build instructions were fantastic. Don’t do this as a First Solder Project… it takes skill and finese with an iron. I got this because I often take a smaller amp than my Super to gigs, and always miss the dreamy sound of the Super’s Harmonic Vibrato.

Add a review

What You WIll Need

    Here's what you will need to build the Quaverato Harmonic Tremolo Pedal KIT. Tools marked (*) are available from Zeppelin Design Labs; follow the links! See also the online Quaverato Assembly Manual, available on the Documentation tab.
    • TOOLS
          • *Digital multimeter
          • #2 Philips screw driver
          • Small flat-head screwdriver
          • Needle nose pliers
          • *Wire strippers
          • *Small diagonal-cutting or flush-cutting pliers
          • X-acto knife or hobby knife
          • 8mm, 10mm, and 5/8” sockets and driver; in a pinch, pliers may work as well.
          • *Soldering iron (not a soldering gun, or a “cold heat” iron), good quality, 15-50 watt. An iron with a temperature control and a stand is best. Use a small or medium size tip, with conical or chisel shape.
          • Solder sucker or solder braid (optional, but very handy if you have to remove or repair any components!)
          • Damp sponge or dry solder-cleaning pad
          • Clamp or vise to hold the printed circuit board while soldering (optional, but handy)


  • Download the Manuals:
  • Archived Manuals:
View Demo Videos:
  • Watch the official tutorial videos, plus many user and press reviews and demos on our YouTube channel.