On 06.07.2018 13:25, Pali Rohár wrote: > I did some investigation and basically this is the list of all known > codecs used in A2DP: > > Mandatory: > 0x00 - SBC > > Optional: > 0x01 - MPEG-1,2 (aka MP3) > 0x02 - MPEG-2,4 (aka AAC) > 0x04 - ATRAC > > Vendor specific: > 0xFF 0x004F 0x01 - aptX > 0xFF 0x000A 0x01 - FastStream > 0xFF 0x000A 0x02 - aptX Low Latency > 0xFF 0x00D7 0x24 - aptX HD > 0xFF 0x012D 0xAA - LDAC > > And also I found some references that some sort of raw 16bit PCM samples > via codec id 0x05 are used... But I have never seen such product. > Could it be Samsung UHQ-BT? https://www.samsung.com/uk/mobile-accessories/level-on-pro-wireless-headset-pn920/EO-PN920CFEGWW/ There are also: 0xFF 0x0075 0x0102 â?? Samsung HD (found on Samsung LEVEL Link) Value hex dump: 7a 0xFF 0x000A 0x0103 â?? Unknown codec found on Bose QuietComfort QC35 II Value hex dump: 07 06 00 00 ff ff 02 35 0xFF 0x000A 0x0104 â?? Unknown codec found on Bose QuietComfort QC35 II Value hex dump: 07 08 00 02 c0 ff 8c 84 e2 00 Samsung LEVEL on/on pro also have support for what Samsung call "Scalable Codec".