To add sound effects: 1. Record sound from Internet (https://elements.envato.com/sound-effects) or on your own with Iphone. Search for sound, click on clock icon > Download Preview. 2. If using your own recording from Iphone, upload to Google drive and download onto your computer. 3. Convert to mp3 with https://online-audio-converter.com/ converter on Internet, download and save onto desktop. 4. Drag file onto stage or import into Library. 5. Press F5 in timeline to see entire orange bar. 6. Add frames before sound to move to correct frames.
Lip Synching
Trimming Audio Clip....
Select the keyframe on which the sound is placed.
In the Property inspector, locate and click the Edit Sound Envelope button (the pencil icon to the right of the Effect drop-down list) in the Sound section. ...
Move these sliders to edit the in and out points of the sound or to trim unnecessary silence.