+ Learn a new musical skill in ten minutes. Explore Soundfly’s wide array of free online courses and gain a musical edge during your lunch break. Or sign up for the Soundfly Weekly newsletter and learn something new every Tuesday! By now, your vocal should be sounding great — nice and punchy with just the right frequency balance and the perfect amount of space. But people have short attention spans these days, so you’ve got to shake things up if you want to keep them interested for three whole minutes.