It's not about the Bluetooth version, but rather about Qualcomm extensions, namely QHS. It should be supported starting from QCC514x, but the actual "lossless" is only available in QCC517x+ (including QCC52xx and QCC72xx)
Yes, I have asked about BT hardware like QCC3086 and others chips. On qualcomm site I found that the newest chipset is QCC3084; QCC5181 or Im wrong? Im looking for new BT with lossless codec + i2s output and with good documentation/software.
The newest are QCC7226/8 and QCC5229, but you can't buy them that easily. The next best option is QCC5181.
Software and documentation are quite bad for all of chips.