How can you attenuate/filter only frequencies that are above a certain db level? (for quiet performances with clapping 10 db's louder than the music.). This should be straightforward... not sure how to execute this with Logic or Audacity.
My preferred way in Audacity:
1. Highlight the area with loud clapping.
2. Effect > Hard Limiter
3. Set Residue Level to 0.7 Basically this softens the limiter somewhat making it not sound offensive like a limiter often does.
4. Set dB limit to -12 or so. You may have to set it a little bit lower than you think because changing the Residue Level makes your setting here less than a "hard" limit.
5. Hit OK, then decide if that does what you wanted it to without actually limiting the music. You will have to go back and forth and undo / redo a couple of times to get it where you want. Make sure to leave Residue Level at 0.7, but adjust the dB limit.