Whatever the recording, audio just wants to be heard: the trick is picking a shape that plays where you need it. It was born in wherever your microphone, DAW or download came from, and its real weak spot is nothing in particular; the limits belong to whichever format it happens to be wearing.
FLAC is the audiophile's handshake: CD-perfect sound at roughly half the shelf space. Free Lossless Audio Codec: think ZIP for sound: it decompresses back to the exact original. That makes it the right destination when what you need is archiving music with zero quality loss and a genuine size saving.