Non-compression

Linear pulse-code modulation

• .L16 Player Protocol
• .WAV Player Protocol
• .AIFF Player Protocol
• .AU Player Protocol
• .PCM Player Protocol

Pulse-density modulation

Pulse-amplitude modulation

Lossless compression

Free lossless Audio Codec (FLAC)

Apple Lossless Audio Codec (ALAC)

Monkey's Audio (APE)

OptimFROG (OFR)

Tom's verlustfreier Audiokompressor (TAK)

WavPack (WV)

True Audio (TTA)

Windows Media Audio Lossless (WMAL)

DTS-HD Master Audio

Dolby TrueHD

Meridian Lossless Packing (MLP)

MPEG-4 Audio Lossless Coding (MPEG-4 ALS)

MPEG-4 Scalable Lossless Coding (MPEG-4 SLS)

RealAudio Lossless

BFDLAC (BFD Lossless Audio Compression)

L2HC

ATRAC Advanced Lossless

Direct Stream Transfer (DST)

Original Sound Quality

Lossless Audio (LA)

Shorten (SHN)

Lossless Predictive Audio Compression (LPAC)

Lossless Transform Audio Compression (LTAC)

MPEG-1 Audio Layer lll HD (mp3HD)

RK Audio (RKAU)

Lossy Compression

...

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H.120

H.261 (a.k.a. Px64)