Player Voxware MetaSound (a variant of NTT TwinVQ) Windows Media Player (voxmsdec.ax) FFmpeg (decoder only) Vorbis aoTuV FFmpeg libvorbis Tremor (decoder only) Windows Media Audio (WMA) Windows Media Encoder FFmpeg AES3 SMPTE 302M FFmpeg (decoder only) Dolby E FFmpeg (decoder only) Bluetooth Bluetooth Special Interest Group Low Complexity Subband Coding (SBC) BlueZ's SBC library (libsbc) Fluoride Bluetooth stack (successor of BlueDroid) FFmpeg CVSD 8 kHz - used in Hands-Free Profile (HFP) modified SBC (mSBC) - used in Hands-Free Profile (HFP) BlueZ's SBC library (libsbc) Fluoride Bluetooth stack FFmpeg SBC XQ PulseAudio's bluetooth stack (encoder only) PipeWire's bluetooth stack (encoder only) LC3 (Low Complexity Communication Codec) ETSI LC3plus (ETSI TS 103 634) Qualcomm Technologies International (formerly CSR) aptX (a.k.a. apt-X) Qualcomm libaptX FFmpeg aptX HD Qualcomm libaptXHD FFmpeg aptX Low Latency aptX Adaptive FastStream - a variant of SBC codec for bi-directional audio transmission Sony LDAC libldac (encoder only) - used in Android Oreo libldacdec (decoder only) HWA Alliance/Savitech LHDC HWA encoder/decoder LLAC HWA encoder/decoder HiBy Ultra Audio Transmission (UAT) Samsung Samsung HD/UHQ-BT codec Samsung Scalable codec Digital radio Hybrid Digital Coding - used in HD Radio (a.k.a. NRSC-5) NRSC-5 receiver for rtl-sdr (decoder only) Voice (low bit rate, optimized for speech) Linear predictive coding (LPC, used in most of the speech codecs listed below) Code-excited linear prediction (CELP) Algebraic code-excited linear prediction (ACELP) Xiph.Org Foundation Speex, patent free libspeex FFmpeg (decoder only) Dialogic ADPCM (VOX) FFmpeg (decoder only) ITU standards: G.711 (a-law and μ-law companding; 64kbit/s), also known as PCM of voice frequencies Sun Microsystems's public domain implementation FFmpeg (libavcodec) G.711.0 (G.711 LLC) G.711.1 (Wideband extension for G.711; 64/80/96kbit/s) G.711.1D (Super-wideband extension for G.711.1; 96/112/128kbit/s) G.718 (8/12/16/24/32kbit/s) G.718B (Super-wideband extension for G.718; 28–48kbit/s) G.719 G.721 (superseded by G.726; 32kbit/s) Sun Microsystems's public domain implementation G.722 (SB-ADPCM; 48/56/64kbit/s) FFmpeg G.722B (Super-wideband extension for G.722; 64/80/96kbit/s) G.722.2 (AMR-WB) 3GPP TS 26.173 AMR-WB speech Codec (C-source code) reference implementation opencore-amr (decoder) FFmpeg (decoder only) G.723 (24 and 40 kbit/s DPCM, extension to G.721, superseded by G.726) Sun Microsystems's public domain implementation G.723.1 (MPC-MLQ or ACELP; 5.3/6.3kbit/s) FFmpeg G.726 (ADPCM; 16/24/32/40kbit/s) Sun Microsystems's public domain implementation FFmpeg (libavcodec) G.727 Sun Microsystems's public domain implementation G.728 (LD-CELP; 16kbit/s) G.729 (CS-ACELP; 8kbit/s) FFmpeg (decoder only) G.729a G.729b G.729ab G.729d (6.4kbit/s) FFmpeg (decoder only) G.729e (11.8kbit/s) G.729.1 (G.729 Annex J; Wideband extension for G.711; 8–32kbit/s) G.729.1E (Super-wideband extension for G.729.1) Google internet Speech Audio Codec (iSAC) WebRTC