Hey, folks! Another techy contra question.

I’m hunting for a music app where I can splice a track into intro, AABB, and outro parts.
After the intro plays, the AABB could loop indefinitely until a button on screen is pressed to signal that I’m ready for it to play the outro.

Bonus points if it's an iPhone app. Does such a thing exist yet?

On a related note, I've had difficulty finding longer recordings of dance music (e.g. over five minutes).
Most tracks I find on Apple Music are but three or four minutes.
Any suggestions?

Thanks!

Harrison