Support for AptX Adaptive

[Exergy]

The inclusion of AptX HD and Low-Latency has been a great addition. However, it is challenging to find headphones that support these codecs when AptX Adaptive has replaced them.

With Bluetooth 5.3 on the OLED model (and maybe the LCD), I believe AptX Adaptive is possible. Please add native support for this!

[deaddoof]

https://gitlab.freedesktop.org/pipewire/pipewire/-/issues/2656

Protocol isn't open apparently. Somebody has to reverse engineer it.

https://github.com/Arkq/openaptx/issues/8

[Exergy]

Was AptX HD and Low-Latency open or were they reverse engineered as well. I have no context to Linux Bluetooth codecs.

[deaddoof]

https://github.com/EHfive/pulseaudio-modules-bt/issues/29

https://github.com/pali/libopenaptx/issues/1

Aptx HD and Low Latency seems to be similar codecs. It seem like Ffmpeg reversed engineered it.


https://patchwork.ffmpeg.org/project/ffmpeg/patch/[e-mail]/#22710

https://patchwork.ffmpeg.org/project/ffmpeg/patch/[e-mail]/

The encoder was reverse engineered from binary library and from
EP0398973B1 patent (long expired).
The decoder was simply deduced from the encoder.

Whelp. The reverse engineer process might take awhile. AptX adaptive might have patents active.

[deaddoof]

Hmmmm. https://gitlab.freedesktop.org/pipewire/pipewire/-/merge_requests/843

[Exergy]

Hmm, so it seems like once the codec is reverse engineered and Valve picks it up in the Steam OS it will work. For now, AptX Adaptive is not available on an Linux machines. Is that correct?

[deaddoof]

Originally posted by Exergy:

Hmm, so it seems like once the codec is reverse engineered and Valve picks it up in the Steam OS it will work. For now, AptX Adaptive is not available on an Linux machines. Is that correct?

Pretty much. Patents might be delay it even farther.

It seems like pulseaudio maintainers accidentally pissed off a good audio/kernel engineer. I do not know how many who can reverse engineer and write a decent library.

[Lawrence Of Canadia]

bump

[Shorty]

any new progress?

[👉ĐØŁŁØ-on-DECK👈]

Nothing?

[deaddoof]

Originally posted by 👉ĐØŁŁØ-on-DECK👈:

Nothing?

Protocol reverse engineering are specialized skills and audio is pretty much the thankless subsystem of Linux. Linux have audio problems because there is not a large enough community to deal with all audio problems.

Yea. Expect years for aptx to be supported properly.