A fairly simple one here, as a four piece band you need to get an 11x Band Multiplier. The Band Multiplier is located in the top right corner next to your score. Luckily for this achievement you can have any combination of instruments and difficulties, so if you have 4 mics available you could do this on beginner vocals all by yourself. To get an 11x Band Multiplier you have to have all for player on a 4x multiplier, all have star power available to deploy and you have to be in a band moment (Band moments are activated by hitting all the fire notes with no over strums). Once you are in a band moment and all have star power ready activate it to get you up to an 11x band multiple. If you need band mates for use the Achievement Trading Thread.