Bullfrog Highpass VCF Voice Card

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

The HIGHPASS VCF voice card expands the sound processing capabilities of the Bullfrog by introducing a high pass filter into the game. This allows exploration of high pass and band pass filtering. The voice map has typical VCF controls – frequency CUTOFF, RESONANCE and CV LEVEL. The CV source switch allows selection between three CV sources – the envelope generator 2, the Sample & Hold LFO, which is a pulse wave generator in the Sample&Hold “module”. The voice card has internal audio connections that make patches less cluttered.