Bullfrog Voice Cards

Voice cards expand the functionality of the Bullfrog and make it even more versatile. Some voice cards replace patch cables - they connect the "modules* of the Bullfrog internally, while others have built-in mixers, signal generators, and advanced electrical circuits to control the synthesizer, for example, the Sequencer sends CV to control pitch and gate to start events on the synthesizer and the Sampler/Looper emulates reel to reel tape recorder functionality

The HIGHPASS VCF voice card expands the sound treatment capabilities of the Bullfrog by bringing a highpass filter into the game. This allows for exploring highpass and bandpass filtering. The voice card features typical VCF controls – CUTOFF frequency, RESONANCE, and CV LEVEL. The CV source switch allows for selecting between three CV sources – envelope generator 2, Sample & Hold LFO, which is a pulse wave generator in the Sample&Hold “module”. The voice card features internal audio connections that make patching less cluttered.

The ELECTRIC ORGAN voice card makes internal connections of the Bullfrog to emulate the pipe organ when several notes with octave intervals are played together. It also illustrates the principles of ADDITIVE SYNTHESIS. In additive synthesis, several simpler waveforms are mixed to generate more complex sounds. ”. The voice card features internal connections that make patching less cluttered.

The WIND AND STARS (NOISE) voice card makes internal connections of the Bullfrog so that it automatically emulates randomly evolving wind sounds and blinking stars are controlled by the divider. Toddlers fall asleep better when they hear sounds like these.

The ADSR voice card adds a full four-stage attack/decay/sustain/release envelope that can be triggered by the Bullfrog's GATE button (or notes played on a connected MIDI keyboard). It is internally routed to the VCA once connected and features a RELEASE CV input, as well as a seperate OUTPUT to get another copy of the ADSR envelope that can be patched elsewhere.

The GESTURE CONTROLLER voice card gives a new type of control over the Bullfrog, allowing for it to be played like a Theremin, with some handy extras. The PITCH and VCA/VCF sensors of the Gesture Controller are internally routed to the VCO pitch and VCA level/VCF cutoff parameters of the Bullfrog once connected. The card also features a built-in pitch quantizer that can be turned on or off as desired, an adjustable pitch range for the sensors (1V, 3V or 5V) and another toggle switch for an additional internal connection which allows for sending gates to the Bullfrog's EG’s from the VCA/VCF sensor. Besides the internal connections, the card also has separate outputs for PITCH CV and VCA/VCF CV from the sensors that can be patched elsewhere.

Refer to the Bullfrog User Manual for more information on the voice cards.