Helm Steer your Sound Screenshots Hunter's comment Helm runs in GNU/Linux, Mac OSX and Windows. Run Helm as a standalone synthesizer or as an LV2, VST, VST3 or AU plugin. Comes in both 32-bit and 64-bit

You may know that I am a hobby producer and Infected Mushroom fan. In this video they introduce their gatekeeper. A VST plugin whose strength is to adjust the volume with changing rhythm. The effect is