bullfrog is a classical subtractive synthesizer - 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 the functionality of a subtractive synthesizer and the principles of sound design with instruments like these.
features and specifications:
fully analogue design
highly accurate voltage controlled oscillator (vco) that tracks great over 8 octaves
manually adjustable and voltage controlled waveshapes - sine-shark fin and pulse wave with pulse width modulation (pwm)
zener diode-based noise generator
resonant lowpass voltage controlled filter (vcf)
voltage controlled amplifier (vca) with adjustable offset
delay effect with adjustable delay time and feedback amount
two looping attack-sustain-release envelope generators (eg)
sample & hold circuit with an individual clock
manual gate button
voicecard slot
built in speaker
din5 midi input
usb connector
dimensions: 40 x 385 x 210 mm
weight: 1.8 kg
