Created by Erica Synths & Richie Hawtin, Bullfrog is an educational electronic music
instrument designed to captivate and inspire both youth and professionals alike. Bullfrog
invites you to unlock musicality while combining the thrill of electronic music production
with a comprehensive learning experience.

Bullfrog is a classical subtractive synthesiser – it consists of several “modules” for sound
generation – VCO, NOISE GENERATOR - and treatment – VCF, VCA/DELAY, as well as
“modules” that generate control and modulation signals to control them – ENVELOPE
GENERATORS and SAMPLE & HOLD. The Bullfrog will not make the sound on its own
unless it is patched – using eurorack patch cables to interconnect the “modules” or by
inserting voice cards that create internal connections between the “modules” in a specific
way and add extra functionality, like sampler/looper, sequencer, groovebox, etc. This
approach better helps to understand functionality of a subtractive synthesizer and the
principles of sound design with instruments like these.
In order to provide a well rounded understanding of the functionality of this synthesizer and
sound synthesis in general, a comprehensive user manual is created to accompany the
learning process.