Oh yes, being that I'm on an 8 year old computer with 8 year old software, creating covers can be more stressful to design without music. So when ever I'm doing something that requires a good amount of focus, I either randomize my YouTube playlist of music, my iTunes collection or listen to the radio.
Most of my music is rock, metal & alternative from the late 60's to the 90's. Bands like Black Sabbath, The Doors, Pink Floyd, Candlebox, Skid Row, Alice In Chains, The Offspring, Nirvana, Collective Soul, Judas Priest, Van Halen, Motley Crue, Dio, Aerosmith, Foo Fighters to name a few of my favs for those eras.
Of course when a few specific songs come on my workflow increases because of their meaning to me, very special to say the least.
Without music, my slow 1 core, hour glass showing, capacitor bulging, software crashing over stupid little things computer would seriously be out the window, smashed with a sledgehammer many times and then set on fire for good measure.