Frap Tools BRENSOThe Frap Tools Brenso is a dual complex oscillator with a staggering array of modulation capabilities, tuning lock and tonnes of CV connectivity that allow the user to explore a wealth of unique tones and timbres. The dual oscillator design, with one oscillator modulating the other has been a popular mainstay with additive synthesis for a really long time, providing complex FM timbres, wavefolding and elevating simple inharmonic tones into more