By default it is set to None, so if you don’t change it you will record no audio.
That is how one chooses the audio source. In Quicktime Player, when you do File->New Screen Recording, there is a little down arrow next to the record button. Why is there no sound when I screen record on Mac? If BlackHole is installed successfully, you should see a “BlackHole 16ch” option from the sidebar on the left. This will open up the Audio Devices window. Then, type in “audio midi setup” on the search bar and tap Enter. Press and hold the Command + Space key on the keyboard to access Spotlight Search. This does indeed prevent background noise from the microphone being recorded, but also causes the screen recording to record without any audio, that is, it fails to capture the ‘computer audio’ (for lack of a better term) How do I record internal audio on a Mac with a black hole? System Preferences -> Sound -> Input -> MacBook Pro Microphone -> Input volume to zero. How do I record my Mac screen without external noise? To record computer sound and your voice at the same time in Windows Vista, 7, 8 and 10, start Bandicam -> Video -> Settings -> and choose “(Default Sound Device)” and “Microphone” at the Recording settings, and then check the “Two Sound Mixing” option. How do I record my screen with system sounds? Next to the red record button there is an arrow which opens a menu allowing you to select the audio source. To do so, open the QuickTime Player app, and choose File > New Audio Recording. QuickTime Player is a bundled bit of software that comes with all Macs, and it allows you to record mac system audio.
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How to Screen Record on Mac with Audio »