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Frap Tools Turns the Tables: Feeding Filters into Oscillators for Sonic Mayhem

Frap Tools, the Italian maestros of modular design, take a classic patching paradigm and flip it on its head in this video. Instead of the usual oscillator-into-filter routine, they demonstrate what happens when you send a filter’s output into an oscillator—using their own CUNSA filter and BRENSO oscillator modules. The result? A journey into unconventional FM territory, with cross-modulation, pinged filters, and a taste of creative chaos. If you’re curious about how filters can become modulation sources and want to see just how far you can push a Eurorack setup, this demo is a must-watch.

Frap Tools Bagài, Frap Tools Brenso, Frap Tools Cunsa, Frap Tools Falistri, Whistler Sequencer