Glitchy/ crackly music on iphone6+

when I'm playing music my iPhone music keeps randomly glitching the playback, its usually one little crackle or two. It's worse when I'm using safari, it just barley did a ton of crackling when I was trying to read something onblind as a was scrolling. It's like the phones processor is too slow to play music and do anything else without adding glitchy cracking to the music. Is this really the best this thing can do?