[ GLOSSARY DEFINITION ] Audio ALAC Apple's lossless audio codec. Also known as: Apple Lossless Full Definition & Technical Explanation ALAC — Apple's lossless audio codec.This audio term is part of the CompareTech technical dictionary and helps you read specifications, comparisons, and benchmark data across its device database.See also: Opus FLAC. Related Technical Terms FLAC A lossless audio codec. Audio Opus A modern open audio codec used in apps. Audio ← All Glossary Terms How We Score → ← Previous Term Next Term →