Built in Mic Issue
The input level sound bars in Preferences / Sound for the built-in mic are grey instead of blue.
When I conference call.. other people say the sound from the mic is not good.. its hard to hear, muffled and picks up noise from the computer fan.
In Audio Midi, the Built-in Microphone is set to 2ch 24-bit 48 kHz. Under sound master, the Master bar is also grey colour and the 2 channel bars are set all the way to left and not scrollable. Mute checkbox is unchecked.
How can the sound from the built-in mic be improved?
iMac Retinal 2017 with Big Sur.
iMac Line (2012 and Later)