Frap Tools Brenso is an analog dual oscillator in best East Coast style with ThruZero FM, waveshaper and its own envelope. The oscillator can handle different sync variants, linear and exponential FM; both in ThruZero and cross modulation. Cleverly set normalizations allow modulations between the oscillators including the internal envelope and the wavefolder. Of course, the two oscillators can also be used separately. Soundwise this tone generator moves between defined and present, as well as dynamic, complex and organic. Sounds between amplitude modulation and ring modulation are also possible.