So, this is still a fairly new laptop (OSX 10.9 Mavericks, mid-2013 Macbook Pro, 2.5ghz i5) but I've run into an interesting issue. When I plug in headphones (for this, I used both the earbuds that Apple packs in with their iPods and an Incase set of over-the-ear headphones) I get 2 weird little effects. The first is what I can only describe as an 'OOOOOOOOOoooooooooooooo' whooshing sound in a decreasing whirr a short while after I plug in the headphones. It normally only happens once after I plug in. The second is that I'll have either a little crackling or some small pop very infrequently. Neither is super annoying but I do worry that this is a prelude to my sound card being ineffective or dying or something. (which would suck as this laptop is only about a month or so old) And if this is a major problem, I'll want to return this before it's too late (and maybe aim for the same unit refurbished or something) Anyways, if there's anything else I can help with, please do let me know and I'll provide what information I can.