Synthesizer & drum set - Level 3 - Digital Download SKU: H1.2680RDP Composed by Bonnie McKee & Henry Walter, Katy Perry, Lukasz Gottwald, and Max Martin. Arranged by Chris Peck. General Worship, Sacred. Rhythm parts. 6 pages. Hope Publishing - Digital #2680RDP. Published by Hope Publishing - Digital (H1.2680RDP). By Katy Perry, Lukasz Gottwald, Max Martin, Bonnie McKee, Henry Walter.Popular pop-song by Katy Perry, Lukasz Gottwald, Max Martin, Bonnie McKee, Henry Walter Handbell choirs will soar to the top of the charts with the sensational pop song ROAR, made famous by recording artist, Katy Perry. The positive theme of the lyrics addressed self-empowerment - and like the tiger, champions the cause. With the addition of drum set and synth parts the music builds to exciting proportions.