So your Mac can speak dialogues. Create your own dialogues, line for line, with different voices per line, with different speeds per line and especially with individual breaks, between the lines. Also, you can adjust the volume per line individually according to your wishes. Whether you want to prepare and coach your own speech, create a script, or simply want to use spoken audio to dub your videos. There are many ways to use this app. The talk line output of each line, You can save as audio files in MP3 and use them in other apps.