Convert MTS to ALAC — Free Online Converter

AVCHD camcorders produce MTS files with either AC3 surround or LPCM stereo audio captured at 48 kHz. ALAC (Apple Lossless Audio Codec) compresses this audio by 40-60% without losing a single sample, wrapping it in an M4A container that integrates natively with iTunes, Apple Music, and every Apple device. Converting MTS to ALAC preserves camcorder audio in Apple's lossless ecosystem.

When building an Apple Music library of extracted camcorder audio — concert recordings, family event soundtracks, nature recordings — ALAC is the only lossless format that integrates seamlessly with iTunes metadata, AirPlay streaming, iCloud Music Library, and HomePod playback. FLAC offers comparable compression but requires third-party apps on iOS and is invisible to iTunes.

For videographers who need to archive project audio in a lossless format while maintaining easy access on Apple devices, ALAC provides the perfect balance. The M4A container supports chapters, artwork, and extensive metadata that make extracted audio self-documenting and easy to browse.