Tube is an oscillator plugin for KORG prologue, minilogue xd and NTS-1. It couples a super-flexible noise generator with a feed-forward comb filter, a combination that we call “resonator modeling synthesis”. By modulating the noise density, the noise generator can create a very wide variety of signals such as bursts, gusts of air or sand, scratching, particles dropping onto a surface – and beyond. When these special signals are used to “excite” the resonator, Tube produces incredibly lively, nature-like tones: from woodwinds, plucked and bowed strings, to much more experimental, randomly evolving ones. Tube also features its own low-frequency oscillator, an envelope generator, and allows its noise signal to be used dry for even more sound design possibilities.