Convert MTS to AAC — Free Online Converter

MTS (AVCHD) camcorder files contain high-quality audio recorded as Dolby AC3 (5.1 surround at 256-640 kbps) or 16-bit LPCM (uncompressed stereo at 1536 kbps). AAC (Advanced Audio Coding) is the modern successor to MP3, delivering transparent audio quality at 128-256 kbps. Converting MTS to AAC extracts the camcorder's audio track and re-encodes it into the most widely supported lossy audio format.

Camcorder audio often captures valuable content — wedding vows, live performances, conference speeches, natural soundscapes — that deserves extraction and preservation independently from the video. AAC is the ideal target because it provides the best quality-to-size ratio of any lossy codec, with native playback support on every modern device and streaming platform.

AVCHD audio tracks are stored as AC3 (Dolby Digital) or LPCM inside the MPEG-2 Transport Stream container. Neither format is practical for standalone audio distribution — AC3 files are uncommon on mobile devices, and LPCM is enormous. AAC gives you compact, universally playable audio from your camcorder recordings.