VB-Audio VoiceMeeter, Virtual Audio Cable, Soundflower, BlackHole Audio Loopback Driver, Dante Via, Synchronous Audio Router, JACK Audio Connection Kit, VB-Audio Virtual Cable, Sound Siphon, GroundControl, Total Recorder, SWB Audio App, AudioBus, SoundDesk, SoundDesk Virtual Devices, iShowU Audio Capture, Helvum are some alternatives to Loopback.