For those in music production, Audioroute is an open-source library that allows different Android music apps to exchange audio and MIDI data.
The most reliable way to route audio between Android devices or into a PC is using a physical 3.5mm TRRS loopback cable iRig-style interface virtual audio cable for android
Since Android does not have a native "Virtual Audio Cable" (VAC) driver like Windows or macOS, users typically achieve this functionality through dedicated apps that bridge audio between mobile and desktop devices or between Android apps For those in music production, Audioroute is an