OptimFROG DualStream is a lossy codec, aimed to fill the gap between perceptual coding and lossless coding as OptimFROG DualStream has an option to produce a correction file. This file can be used, in combination with the main lossy-encoded file, for lossless decoding, but not, unlike Wavpack hybrid for instance, for playback.
- "How to use OptimFROG DualStream Correction files?". Hydrogenaudio Forums. Retrieved 2015-07-13.