Next, set the Input to Soundflower (64ch), so the destination application can only hear the routed audio from the source application, and not pick up any sound from the default microphone. In System Preferences > Sound, set the Output to Multi-Output Device, which I'd defined as Soundflower (64ch) + Internal Speakers / Headphones, so both the destination application and I can 'hear' the audio. Other alternatives include iShowU Audio Capture or Loopback. On a computer, install a utility software that can route audio between applications.įor Mac, I use Soundflower, with a setup tutorial video here. How to transcribe a (live) video on a Mac without playing the sound on speaker mode, using Otter.aiġ.