Harmadillo is a flexible harmonic tremolo algorithm offering everything from lush soulful tremolos to psychedelic mind-bending weirdness. It has a player-centric feature set that allows you to sculpt your sound in powerful ways, and offers a wide variety of LFO shapes, from traditional sine, triangle, and pulse shapes to newer shapes like ramp, lump, rump, and a continuously variable decaying slope.

Harmadillo draws inspiration from classic tube-amplifier harmonic tremolo circuits and analog harmonic tremolo pedals. We’ve noticed that our vintage tube amp seems to have a scoop in the midrange for its harmonic tremolo effect that lines up with its crossover frequency. This scoop is partly the result of the crossover not being perfectly flat. Though it may be “imperfect” as a crossover, it also sounds great, and we've seen similar scoops on harmonic tremolo pedals. Because of tolerances in the analog components, no two are exactly alike. With Harmadillo, you can adjust not only the frequency of the crossover but also the amount of overlap between the low and high bands, and this allows you to adjust the character of the tremolo in subtle or dramatic ways. It also features a drive control so you can add a little extra warmth to your sound, as well as a tone control so you can shape the low or high end.

Harmadillo features three ENV (envelope follower) controls that use your picking and playing dynamics to affect the tremolo's rate, depth, and crossover frequency. These controls can make subtle or dramatic changes to your sound and add significant flexibility to the effect. For example, you can use the ENV DEPTH control to temporarily reduce the depth of the tremolo when you pick -- this allows you to use deeper depth settings without having to worry about your attacks getting lost. As another example, you can use the ENV FREQ control to create auto-wah or phaser effects controlled by your picking and playing dynamics. To help you better understand how the ENV controls work, we've included a custom user interface for the desktop and tablet versions of H9 Control that provides animated feedback.