VB-Audio VoiceMeeter, Virtual Audio Cable, Soundflower, Loopback, BlackHole Audio Loopback Driver, Dante Via, Synchronous Audio Router, JACK Audio Connection Kit, PulseAudio, VB-Audio Virtual Cable, GroundControl, Vienna Ensemble Pro, vsound, SoundDesk, SoundDesk Virtual Devices, Virtual audio capture grabber device, Carla, Advanced Linux Sound Architecture are some alternatives to AudioBus.