The Transcribe! application is an assistant for people who sometimes want to work out a piece of music from a recording, in order to write it out, or play it themselves, or both.
Conventional music players (whether hardware such as a CD player or an iPod, or software such as Windows Media Player or iTunes) are really designed for people who want to listen to whole tracks. They are very inconvenient for transcribing music as they are not designed for this purpose. If you copy the recording to your computer's hard disk as a sound file then you can use Transcribe! instead. Transcribe! offers many features aimed at making the transcription job smoother and easier, including the ability to slow down music without changing its pitch, to analyse chords and show you what notes are present, and the capability of adding markers and textual annotations so you can easily navigate around the track. Transcribe! also has a piano keyboard displayed on screen which you can click to play reference notes.