From the Sound pull-down menu, select your main loop and set the sync method to Event. Next, you need to set it to loop enough times to cover the full playback time of the Flash movie. Lastly, to prevent the sound from coming in too abruptly and sounding unnatural, you may want to have it fade in. Flash allows you to set any number of ease in and out points. For this, you just need to add a sound envelope. Click on the Edit button next to the Effect menu to bring up the Edit Envelope window.. Simply click the sound volume line on either track, near the beginning of the sound loop. This will set a point in both tracks. Now pull down the point at the very beginning of the loop all the way to the bottom. Repeat this in the other track and weΓÇÖre all set.
