how to use virtual audio cable with asio and reaper

ReWire is completely unrelated - it’s indeed a protocol for inter-application audio routing, but is now obsolete AFAIU, and both applications need to be able to use it (SC can’t). You would use ReaRoute as the souncard in your other application (that sends audio to Reaper). Each device simulates an audio adapter (card) whose output is internally connected to the input, making a loopback. VAC creates a set of virtual audio devices. I don’t think you need an ASIO-capable soundcard to use it - Reaper can use other APIs to talk to the soundcard. Virtual Audio Cable (VAC) is an audio bridge between applications that transmits sounds (audio streams) from app to app, from device to device.

ReaRoute is a virtual ASIO driver that allows other (ASIO-capable) software to send audio to Reaper. If you’re using an interface with ASIO I think Reaper has a ReaRoute or ReWire plugin that should allow you to connect it with other audio programs. follow any necessary setup in Reaper to get audio from ReaRoute.start SC and specify something like ASIO : ReaRoute as the soundcard (I haven’t tried this, so I’m not sure this works also please double check the soundcard name).make any appropriate connections in qjackctl.start SC and use JackRouter as the soundcard.start reaper and use JackRouter as the soundcard As for Bitwig and Reaper, I am able to use SAR as the playback device, create virtual playback devices to act as a sink for system sounds (OS sounds, browser audio etc), and create live audio channels to get system sounds to actually play on the speakers via Jack which uses ASIO4ALL.On Windows, I think there are two ways to do this (though I can’t test atm):

How to use virtual audio cable with asio and reaper