The supported formats differ, depending on how you use the OPUS-QUAD.
Refer to the sources below for details, which might change according to updates.
■ USB device/rekordbox for Mac/Windows (Export mode)/rekordbox for iOS/Android
MP3, AAC, WAV, AIFF, Apple Lossless, FLAC
See [Supported file formats] in [Product overview] in the Instruction Manual.
You can read the Instruction Manual [here].
■ rekordbox for Mac/Windows (Performance mode)
See [File formats that can be loaded and played] in the rekordbox Instruction Manual.
You can read the rekordbox Instruction Manual [here].
■Serato DJ Pro
See the Serato DJ Pro manual, available from the Serato website [serato.com].