How can I control the position at which the music playback will begin?
For example, I want to hear a snippet of the song and not the entire song - how do I jump to that exact position?
To fast forward in the Music app, simply tap and hold down the next track button, and the song will skip forward. Release when you want to resume normal playback.
To rewind, do the same with the previous track button.
This also works with the playback controls in the Volume Bar that pops up when you press the phone's volume keys.