BTR AMP
AIFF is Apple's uncompressed audio format — raw PCM, like WAV, but with proper metadata support, which is why studios, DJs, and archivists who refuse compression tend to standardize on it.
Why the built-in Music app isn't enough
The Music app plays AIFF, but it offers no way to edit tags on the device, no custom organization, and it slows down as libraries scale — and AIFF libraries are heavy, since uncompressed audio runs several times the size of FLAC. Big files make the surrounding tooling matter more: what you can sync selectively, how you manage storage, and whether transfers need a computer in the loop.
How BTR AMP plays AIFF
BTR AMP plays AIFF at full quality, up to 96kHz/24-bit and beyond through a USB DAC, with the exact codec shown per track — e.g. FLAC 2933kbps · 96kHz · 24-bit for a hi-res file. AIFF files carry ID3 tags, which the on-device metadata editor handles along with cover art and ratings. A built-in file manager plus Files app integration keeps large uncompressed collections manageable, and AIFF sits in one library with ALAC, FLAC, and every other supported format.
Getting your AIFF files onto your iPhone
Uncompressed files are big, so fast local options help — SMB from your computer or Wi-Fi transfer over your own network.
Send files over Wi-Fi from any browser on your computer (Connect → Wi-Fi Transfer), pull them from Google Drive, OneDrive, iCloud Drive, an SMB share, or WebDAV, use AirDrop, or play straight from a USB drive. The transfer guide walks through each method, and the importing guide covers the details.