The Red Noise Pedals Butterfly Harmonic Tremolo is a pedal that produces a harmonic tremolo, a different animal from the standard tremolo pedal. Where an ordinary tremolo turns the whole signal up and down, a harmonic tremolo splits the sound into high and low frequency bands and modulates them in opposite patterns. Pedal of the Day describes the effect this way: "harmonic tremolos filter the high & low frequencies of the soundwave, then modulate the remaining signal in opposite pat[terns]". The result, in the reviewer's words, is "a warm and articulated tremolo sound that provides pliable tonality and flexibility"1.
Controls and features
The Butterfly's LFO/Man toggle switch decides what drives the modulation:
- LFO: the effect modulates automatically, moving according to the chosen wave shape and speed1.
- Manual: the switch is used as a low pass filter, putting the sweep under direct control1.
A further feature is an external sync input connected to the Tap Tempo button, which allows the LFO to be synchronized to an external clock signal1.
What reviewers said
Pedal of the Day reviewed the Butterfly in September 2020 and called it "a good tremolo pedal", summing it up as follows1:
"In short, it sounds fantastic, and different, and awesome."
The reviewer's overall impression was of "loads of modulation to explore"1.
Videos
Demos In The Dark
Pedal of the Day
Anne Sulikowski
Sources (1)
- Red Noise Pedals Butterfly Harmonic Tremolo, Pedal of the Day, 2020-09-02