No Input Noise using Varispeed Delay (my WIP VST plugin)
Made the VST "Varispeed Delay" which has built-in speed control and graphic EQ. When set to 1-2x feedback it turns into no input noise machine. Feed is empty analog input (digital zero input can't trigger noise because it is too pure). The rest is feedback.
EDIT: VST is free and opensource! Get macOS / Windows releases here: https://github.com/silvansky/VarispeedDelay/releases