Jane Vial Jaffe has written thousands of program notes for works from the Renaissance to the present. It's likely that the work you're interested in already has an annotation in her archive! To request a note from her archive or to commission a new one, please fill in the contact form. Click on the links below to see some samples of her work.
Sample Program Notes
Gustav Mahler: Symphony No. 1 in D major, “Titan” (with illustrations and musical examples)
Sample Program Notes with Embedded Audio