Final answer:
The non-musical elements of program music can be specified through comments or program, libretto, and title.
Step-by-step explanation:
The non-musical elements of program music are specified in several ways. One way is through the comments or program, which provide information about the intended meaning or story behind the music. Another way is through the libretto, which is a text or script that accompanies a vocal or choral work. The title of the piece also plays a role in specifying the non-musical elements, as it often provides clues about the subject or theme of the music. However, the conductor is not typically involved in specifying the non-musical elements; their role is primarily to lead and interpret the musical performance.
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