all songs; the whole piece
Refers to every track on an album or the entirety of a single musical work. Context determines whether it means 'all compositions' or 'the entire composition'.
このアルバムの全曲を聴きました。
I listened to all the songs on this album.
彼はその交響曲の全曲を暗譜している。
He has memorized the entire symphony.
I listened to every track on that album.
The same theme can be felt throughout the whole piece.
This DVD includes every song from the live performance.