open FLA flash file in Adobe Flash
Locate music element in library, right on it and go to properties, and update music
Website example: http://www.frescocafe.com.au
Problem #1: if your audio file sounds slow and drawn out this is due to adobe flash
Answer: process or save your files at a different sampling rate. re-sample your files down to 44100 HZ or a lower quality 22050 HZ. Flash likes these two sampling rates the best. You can do 44100 HZ, 16 bit Mono, or 44100 HZ, 32 bit Stereo, it’s the sample rate that matters and will fix the problem.
Problem #2: You get an error when you try to import a music file
Answer: process or save your files at a different sampling rate as above.