The String Quartet Tribute is a series of string quartet covers released by Vitamin Records by several different groups of musicians. They focus on one band per record, and perform classical versions of their songs, generally note for note. They use a wide array of instruments but focus mainly on violins, violas, and cellos. Over the years, they have put out a large number of albums (232), honoring mainstream and indie groups alike. They have put a classical spin on many genres of music, including rock, pop, punk, techno, hardcore, country, metal and rap.