need to set up my komplete audio 1
@Nikita The Komplete Audio 1 is plug and play on macs. Are you able to play sound from youtube on the soundcard? How are you listening to the sound? Through the headphones? On your speakers? Maybe this article can also help: Using the Direct Monitoring Feature on My Komplete Audio Interface
You could also check if the microphone is allowed access on your system and same for KA1 (If it needs it , I don't know !) : Control access to the microphone on Mac : https://support.apple.com/guide/mac-help/control-access-to-the-microphone-on-mac-mchla1b1e1fe/mac