Macbook Pro putting out low sound input
Solution 1:
First, make sure any volume controls in the app you’re using aren’t turned all the way down. Also, try playing a different audio file, CD, or DVD, or try playing the file or disc on another computer or media player to isolate the problem. Check this thread https://support.apple.com/guide/mac-help/if-you-cant-hear-sound-from-your-speakers-mchlp1439/mac