Common lossless compressed audio file formats include

FLAC (Free Lossless Audio Codec) and ALAC (Apple Lossless Audio Codec) both compress audio without discarding sound data. MP3 and AAC-style formats such as MP4A are typically lossy, while WAV and AU are commonly uncompressed formats rather than lossless compressed formats. Therefore, the correct choice is FLAC and ALAC.

AI-written and checked against the verified answer.