To increase the sound, import the sound file into an iMovie project. Once it is in, select the audio recording and drag the volume slider to anything beyond 100% (you can also click the sound button in the app and increase it from there).
To increase the sound, import the sound file into an iMovie project. Once it is in, select the audio recording and drag the volume slider to anything beyond 100% (you can also click the sound button in the app and increase it from there).