Only for owners of the PS3™ version. Add 'Sort Of' - Silversun Pickups' by Only for owners of the PS3™ version. Add 'Sort Of' by Silversun Pickups to your Rock Band™ 4 song library. Compatible with Rock Band™ 4 only. For music credits, visit www.rockband.com. to your Rock Band™ 4 song library. Compatible with Rock Band™ 4 only. For music credits, visit www.rockband.com.