The Fancy Audio Thingy

FLAC? More like "Free Lossless Audio Codec" — which is a fancy way of sayin' your music files get shrunk down to like 50-70% their original size without turnin' into total garbage. ZOMG, right? It's also the name of some free software project that nerds built (bless their hearts) that includes actual codec magic to make it all work. TL;DR: your tunes get squished but still sound pretty AF.

Now here's the catch, y'all — OnSong only plays nice with FLAC if you're rockin' iOS 11 or higher. Srsly. So if you're still clutchin' your iPhone 5 like it's 2013, uh... upgrade already? Your ears will thank you.