All parameters except the filename are optional. The template will link to Commons (which is preferred) if the file doesn't exist on Wikisource.

Description Usage Output
Lazy
{{listen|Alice's Adventures in Wonderland, chapter 1.ogg}}
Listen to this text (help | file info or download)
Normal
{{listen
 |title    = Alice's Adventures in Wonderland/Chapter 1
 |filename = Alice's Adventures in Wonderland, chapter 1.ogg
 |filesize = 7.5MB
}}
Alice's Adventures in Wonderland/Chapter 1 (7.5MB, help | file info or download)
No category
{{listen
 |title    = Alice's Adventures in Wonderland/Chapter 1
 |filename = Alice's Adventures in Wonderland, chapter 1.ogg
 |filesize = 7.5MB
 |category =
}}
Alice's Adventures in Wonderland/Chapter 1 (7.5MB, help | file info or download)