What is yellowcard violin?

Yellowcard is an American rock band formed in 1997. One of the distinctive elements of their sound is the violin, played by Sean Mackin. The use of violin in a pop punk/alternative rock band is unusual and has helped to set Yellowcard apart from their peers. Mackin's violin adds a unique layer to the band's music, delivering soaring melodies that harmonize with the guitar riffs. It has become one of the defining features of the band's sound and has been a signature element in many of their most popular songs, including "Ocean Avenue," "Lights and Sounds," and "Only One."