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LDAC
(sh.itjust.works)
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this post was submitted on 24 Jan 2025
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Opus! It's a merge of a codec designed for speech (from Skype!) with one designed for high quality audio by Xiph (same people who made OGG/Vorbis).
Although it needs some more work on latency, it prefers to work on bigger frames but default than Bluetooth packets likes, but I've seen there's work on standardizing a version that fits Bluetooth. Google even has it implemented now on Pixel devices.
Fully free codec!
opus isn’t lossless
Nobody needs lossless over Bluetooth
Edit: plenty of downvotes by people who have never listened to ABX tests with high quality lossy compare versus lossless
At high bitrate lossy you literally can't distinguish it. There's math to prove it;
https://en.wikipedia.org/wiki/Nyquist%E2%80%93Shannon_sampling_theorem
At 44 kHz 16 bit with over 192 Kbps with good encoders your ear literally can't physically discern the difference
for bluetooth to be a proper replacement for wired audio it needs to support 56kbps dial up.