On Mac I use Soundflower to redirect audio between apps. There'a also AULab which can be used for some effects in realtime (e.g. adding reverb and redirecting

On Mac I use Soundflower to redirect audio between apps. There'a also AULab which can be used for some effects in realtime (e.g. adding reverb and redirecting to built-in audio out). https://github.com/mattingalls/Soundflower https://github.com/mattingalls/Soundflower https://www.apple.com/nz/itunes/mastered-for-itunes/ https://www.apple.com/nz/itunes/mastered-for-itunes/