Do 20 second interlude tunes count as music?

[puggsoy]

Well, by your definition, these seem to come under sound effects. There are four, and they each play at a different event:

• When you complete a regular level
  
• At the start of a boss level
  
• When you fail a boss level
  
• When you complete a boss level
  

If anybody wants to check though, I've already uploaded them here. Each of their names begins with "interlude".