Loopback by RogueAmoeba is an audio routine tool from Rogue Amoeba that enables you to combine the audio from multiple sources and mix them together. It’s one of the most powerful recordings, processing, and mixing tools for macOS. You can get a stereo mix of the audio coming from your various sources, e.g., microphone, line-in, or other inputs, and then apply different effects or filters to the stereo signal and then save that processed sound file for later use.
Input as many channels as you want without any restriction. Talking about the use cases, you can use it for guest podcasts combining multiple mic inputs in one channel, turn multiple hardware to produce music, create top-notch screencasts with all mic working, and record gameplay videos with commentary and game sound simultaneously.
Powerfully customizable monitoring options enable you to use other devices to hear exactly how your virtual audio device sounds, in whole or in part. Another great feature is that you can control each channel stream independently, i.e., change the volume for each device, change the gain, sensitivity, and much more. All in all, Loopback by RogueAmoeba is a great tool that you can consider among its alternatives.
Loopback by RogueAmoeba alternatives