Feature Request: Largest Audio Segment Looping and Pause Functionality

[AndrewMLawson]

In its current state, Pydub does not support looping functionality for audio unless it is a shorter track overlaid on a longer track, in which case the shorter track will loop until the longer track is finished. Adding a looping functionality could be helpful for users incorporating Pydub into their projects who want to create an overlaid AudioSegment that loops continuously. Looping functionality would also require a pausing or stopping of audio playback method, which is another feature that could be helpful.