1. Different tunes: The Peony Pavilion is a poem-reciting tune in traditional opera; Orfeo is an orchestral piece and the tune is an aria.

2. Different rhythms: The rhythm of The Peony Pavilion is the water mill rhythm, which is relatively slow, with a beat of four-quarters; the rhythm of Orfeo is bright and tense.

Music is an art form and cultural activity whose medium is timely organized and regular sound waves (a type of mechanical wave). Its basic elements include strength, tonality, duration, timbre, etc. These basic elements are combined with each other to form the commonly used formal elements of music, such as rhythm, melody, harmony, intensity, speed, mode, musical form, texture, etc.