mixtapemix‧tape /ˈmɪksteɪp/ noun [countable] 
a piece of music that is produced by mixing different voices or musical instruments that have already been recorded: 
'All types of electronic dance music mixtapes for sale.' mixtape CDs
a piece of music that is produced by mixing different voices or musical instruments that have already been recorded: 'All types of electronic dance music mixtapes for sale.' mixtape CDs