Brett and Eddy had a beef with Davie504, ( aka Davide Biale ), for hating on the bass. This began a "war" with them making videos and challenging themselves to play a piece on either the bass or the violin. Davie knew the bass but he had to play the violin, Brett and Eddy knew the violin but they had to play the bass. Eventually, the beef got so intense and loved by the fans that they had a entire concert battle named: "Violin VS Bass", it was made in front of a live audience and was not only an end to the "war", but it was also a thank you moment for the support both the creators received.
When the Vioilin VS Bass battle was announced, both Davide Biale, ( Davie 504 ), Brett and Eddy, ( TwoSet Violin ) both were famous and had reached the million subscriber mark. However, TwoSetViolin had less subscribers than Davie504.
One of their key jokes is: "Practice 40 hours everday". This joke also resembles the weird parent rule of a asian kid having to learn instruments at a young age without telling them the reason for why.
They first met in an after school maths group.