Audacity Forum

Am running MAC OS High Sierra version 10.13.6 with Audacity version 2.0.6
Have pieced together 12+ video clips to create a single file containing
a fireworks display. Some clips contain background talking. I would like to
be able to remove all talking from the entire video and leave the noise
associated with the fireworks in tact. Any suggestions on how to
accomplish this with Audacity would be much appreciated.

Probably the best solution is to find some firework sound effects and replace the soundtrack, if it's work that much work to you. Or maybe there is enough good-sound that you can re-use the good parts to replace the parts with talking.

Audacity may be of some help, especially for synchronizing the original and replacement sounds. But, you'll have to use a video editor to combine the new audio with the video.

"You can't un-bake a cake or un-fry an egg and you can't un-mix sound." ...There are some vocal removal & isolation "tricks" you can do with stereo music where the vocals are in the phantom center but it only works under ideal conditions and other centered-sounds also get removed.