The 851N currently supports the following formats:
- WAV containing uncompressed PCM 16-24 bit, 32-192kHz
- Apple Lossless (ALAC) containing uncompressed PCM 16-24 bit, 32-192kHz
- FLAC containing losslessly compressed PCM 16-24 bit/ 32-192kHz
- AIFF containing uncompressed PCM 16-24 bit, 32-192kHz
- WMA
- MP3
- MPEG-4
- AAC-HE
- AAC
- AAC+
- OGG Vorbis
- DSD64