Crackling / static developing on audio when screen recording with Quicktime

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Crackling / static developing on audio when screen recording with Quicktime

Hi,

I am using an iMac", 27", 2017 model — 3.4 GHz Quad-Core Intel Core i5. I am running on Monterey 12.7.6. I use Quicktime to capture Screen Recordings with audio using the built in mic. Initially the audio starts off fine but after a few minutes or so a crackling-static-sound starts developing on the audio. Then, eventually the video portion freezes but I still hear the crackling audio until the end of the recording. Overall everything starts out fine, but then it starts crackling and then gets worse as the recording goes on. Nothing changes in the environment that I am recording in to explain why this would be happening.

Thoughts or solutions?

iMac 27″ 5K

Posted on Oct 31, 2024 1:12 PM

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Answer 1

Oct 31, 2024 3:36 PM in response to Chemol_104

for the best results recording audio along with a screen recording on your Mac, you should not use the built in microphone to record the sounds coming from your speakers.

to record the mac's internal sound with quicktime (or also “shift-command-5”) you need additional software. i use the free BlackHole Virtual Audio Driver. then you can choose "BlackHole 2ch" in the recording options instead of "Built-in Microphone."

you will also need to set up a multi-output device in your audio MIDI setup utility to be able to both hear and record the internal audio at the same time.

to set up a multi-output device:

Open Audio MIDI Setup: (found in /Applications/Utilities)

hit the '+' button in the bottom left corner and select "Create Multi Output Device"

then in the panel that appears on the right, in the Multi-Output Device tab, select "Built-in Output" AND "BlackHole 2ch". (and, if you want, any of your other connected devices.)

once you do that, (and BEFORE recording) you can choose "BlackHole 2ch" or "Multi-Output Device" in your menubar "sound options".

to both hear the speakers and record the audio at the same time, choose "Multi-Output Device". before choosing multi-out, set the internal speakers' volume to a comfortable level first. you cannot control the volume once you are in multi-out mode.

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