Erica Synths Bullfrog Acid Bassline Voice Card

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 ACID BASSLINE voicecard instantly provides you all necessary connections to produce a punchy bassline. For this patch you will need an external controller – a MIDI keyboard, MIDI sequencer or CV/GATE sequencer. All audio sources – SINE OUT, PULSE OUT and NOISE are mixed and sent to the VCF and then to the VCA. A gate starts both ENVELOPE GENERATORS; the EG 1 controls the VCA, the EG 2 – cutoff of the VCF. In addition S&H output controls the waveshape of the VCO. Set both EGs to the FREE mode, set VCA OFFSET all way counter clockwise. Now, set desired audio mix, tweak CUTOFF and RESONANCE knobs (the best acid bassline feel is, when resonance is set above 1PM) and set ATTACK and RELEASE to desired envelope times. The EG 2, controlling the VCF is recommended to have longer ATTACK time and shorter RELEASE time, compared to EG 1.