FLAC (Free Lossless Audio Codec) is a lossless data compression format available as a file format on 702, 702T, 722, and 744T recorders. The FLAC algorithm is very processor intensive, and subsequently has several limitations.
- Records to one media at a time. This is the same limitation as when recording MP2 and MP3 files.
- With 4-track recordings, 48 kHz is the highest available sampling rate.
- With 2-track recordings, 96 kHz is the highest available sampling rate.
- Recording 24-bit/48 kHz/4-track/mono to an external DVD-RAM drive is not recommended, though this file format will record reliably to an external hard drive. If recording to an external DVD-RAM reduce the track count, reduce the bit depth or sampling rate, or use polyphonic files instead of monophonic files.
- Notes are disabled, all other metadata is stored.
- Auto file header saving does not apply to FLAC files, if power is lost while recording the file may be invalid.
Sound Devices offers Wave Agent Classic, a free Windows based software used to extract FLAC to WAV files as well as combining monophonic and splitting polyphonic files.