Features

• 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

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.

What’s included:

• BULLFROG synthesizer
• Universal 12VDC wall wart adapter
• User manual
• 10 patch cables
• 3 pre-patched voice cards: Sequencer, Acid Bassline, Sampler Looper
• 3 DIY voice cards

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.