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HydrogenAudio

Lossy Audio Compression => Other Lossy Codecs => Topic started by: Foobar_2012 on 2020-10-20 18:50:21

Title: How do you ask for low latency with aptX Adaptive?
Post by: Foobar_2012 on 2020-10-20 18:50:21
How do any given headphones know if I'm gaming or listening to music, and therefore what latency/quality ratio might be best? Can I specify somehow? Thanks
Title: Re: How do you ask for low latency with aptX Adaptive?
Post by: Roseval on 2020-10-21 09:53:18
aptX adaptive has a latency of about  80 ms according to Qualcomm.
This latency is fixed.
The adaptive part is the bit rate (279-480kbs) but this is about the stability of the connection, not about latency.
Title: Re: How do you ask for low latency with aptX Adaptive?
Post by: Foobar_2012 on 2020-10-21 11:30:10
Ah you're right.

I also just read that aptX Adaptive isn't really compatible with LL either, as it reverts to regular aptX mode when connected to a LL device. Does that mean that Adaptive (80ms) isn't as good as LL (40ms) for latency or is there more to it? It seems strange that Qualcomm would retire a technology that they haven't full replaced.
Title: Re: How do you ask for low latency with aptX Adaptive?
Post by: Brand on 2020-10-21 12:07:40
AFAIK, that's that. If you want that low latency you need to have LL-capable hardware, on both the PC and the headphones.

Things should improve in the future with Bluetooth 5.2, which uses a lower latency codec by default.
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