We present a score-based web interface for classical music listening. The interface is designed for comparative listening of a musical piece. Employing the results of audio-to-score alignment and note intensity estimation from recordings, the interface provides the musical score of the piece with score-synchronized recordings. The score of the music is rendered on the web browser by Verovio. The note intensity, which is estimated from the recordings, is mapped into the opacity of each note in the score.