Does LDAC really end debate about bluetooth quality?

May 21, 2024 at 5:40 PM Thread Starter Post #1 of 3

Sauerteig

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Elsewhere a proponent of bluetooth asserted that LDAC-- a high definition codec developed by Sony--refutes concerns about bluetooth quality. Supposedly this codec achieves music quality between 600-900 kbps. I do use some lossless flac files with kbps in the high hundreds and thousands, but I cannot hear much of a difference with kbps.

Overall I really dislike bluetooth. You can see a post here summarizing the reasons.

https://www.head-fi.org/threads/an-aversion-to-bluetooth.967814/#post-17515228

I am still not convinced bluetooth achieves as an invariable constant high definition, and this is because of how fallilbe wireless is generally. In relation to the Oceangate tragedy, an internet personality correctly chided wireless technology, stating it is for nothing important. And just as he would not trust wireless controllers on a game, he would not trust his life on it. Well, I feel the same way about my listening experience.
In addition, I have been informed that bluetooth imposes higher volume constrictions.

I will concede have not RECENTLY done any bakeoff tests comparing bluetooth with the wired headphones I like.
 
May 22, 2024 at 7:39 AM Post #2 of 3
I do use some lossless flac files with kbps in the high hundreds and thousands, but I cannot hear much of a difference with kbps.
FLAC is lossless compression.
The bit rate is not an indicator for sound quality. It indicates how complex a signal is. The more complex, the higher the bit rate. The result after decoding is always lossless.

LDAC is lossy compression by design.
It can play 24/96 but to do so it has to squeeze 3072 kbs into 990 kbs. Obvious one can only obtain this by using lossy compression.
If you play 16/44.1 it has to squeeze 1411 kbs into 990 (or 930). LDAC doesn't use linear prediction. It must be able to scale down so it is some kind of side band codec.

To compare bit rates is a bit silly. AAC (on iPhone) runs at 256 but as it employs the psycho acoustic model the results rivals LDAC running at 900 kbs.
https://archimago.blogspot.com/2023/08/part-ii-comparison-of-bluetooth.html

I have been informed that bluetooth imposes higher volume constrictions.
Nonsense. That is not Bluetooth but EC rules that limit volume.
 
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