The HP-85 Standard Pac included a program called COMPZR which allowed the user to edit and play music composed of single notes using the internal speaker and the BEEP command.
The program came with a data file which contained instructions to play an adaptation of the final part of Rossini's William Tell Overture.
Audio recorded as my HP-85B was playing the piece (HP85-WilliamTell.mp3)
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The entire score as one file: (HP85-WilliamTell.pdf)