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 SAMPLER/LOOPER voicecard brings techniques used in the early days of electroacoustic and experimental music into the functionality of the Bullfrog. The voice card essentially emulates the functionality of a tape recorder – it records up to 10” of audio from a built-in microphone or from the Bullfrog itself and then feeds it back into the audio path of the Bullfrog, so you can process it via the VCF, VCA and Delay.