Huh? I’ve never met anyone in the backcountry that played music to keep predators away. Even when forced to hike at dusk, the primary risk is quietly stumbling on a predator out stalking, or worse, a predator’s offspring. At most you clap every so often, maybe talk/sing to yourself, or dangle some stuff from your pack at higher risk times. Animals will do the hard work of avoiding you When you’re nearby, but its quite unnecessary to notify everything with in a 1km radius of your presence.