Homemade music compilation ... or a hint to the circled letters

• This-and-that recording for a friend or a party
• Underground rapper's demo
• Personalized musical gift
• Song compilation
• Homemade collection of songs

Wikipedia Word definitions in Wikipedia
A mixtape is a compilation of songs recorded in a specific order, traditionally onto an audio compact cassette. Mixtape or The Mix Tape may also refer to:

Wiktionary Word definitions in Wiktionary
n. A compilation of songs on a tape, usually encompassing many different artists and made without permission.