VB-Audio Virtual Cable - Connect Audio Applications together with a Virtual Audio Device
Super Sound - Super Sound is a resourceful audio and music editor.
VAcard - [NOTE: You can download the application from ...
Audacity - Audacity is a free and open-source audio production software suite that includes a surprising array of editing tools and recording systems.
SoundDesk Virtual Devices by LoudLab - SoundDesk Virtual Devices - Software devices to route audio across macOS.
Add Audio to Video - Add Audio to Video empowers you to add custom audio tracks to your video files.