Want to reduce the bass on this movie recorded in iMovie HD (Mac)... should I?

Question

apply Noise Reducer, Bandpass, Lowpass, or Highpass? Could you provide a brief explanation of each??

Answer 1

I would extract the audio from the imovie project, import it to Audacity and make the changes there. then save the audio as an MP3 or AIFF and bring that into iMovie... and mute the audio that is tied to the video and use the newly imported audio instead.