WH-CH720N support

[progandy]

Just tried it with my WH-CH720N and got these results:

Legend:
✅ = Supported
❌ = Unsupported
? = Untested
~ = Supported officially, pending implementation

Feature	WH-CH720N
Current Playing	✅ (reading, writing ?)
Sound Pressure	?
Battery Life	~ (official app shows one value)
Volume	✅
NC/AMB Settings	✅
Voice Guidance Volume	?
Track Controls	✅
Multipoint Control	~
Speak to Chat	❌
Equalizer	✅ (no way to choose presets)
Touch Sensor Gesture	❌
Power Off	✅
Capture Voice During a Phone Call	?
Map Headphone Gestures to Shell Commands	❌

---

Note: Running the client on linux seems to make the connection unstable, I got a few disconnects followed by reconnects.

[mos9527]

Thx for the report!
FYI the metadata writing is an effect of your OS's AVRCP stack - you can try to play a track on your PC and w/o using any 3rd party apps there and you should see the title, etc on the mobile app w/o modifications as well

[ItsIsmailZ]

Why am I not able to use it on WH-1000XM4 but it is usable on WH-CH720N? Is it something I can fix?
I would love to use this fork since it has more functions than the original, thanks a lot in advance!

[mos9527]

Why am I not able to use it on WH-1000XM4 but it is usable on WH-CH720N? Is it something I can fix?

@ItsIsmailZ WH-CH720N (and XM5 et al) uses a new UUID while the XM4s (and olders ones) uses another UUID for RFCOMM with - unfortunately - quite a lot of command packet differences.

The original fortuantely does work! And there's this PR that added many XM4 specific functions to it that you can build and try it out yourself:

Plutoberth#103 (https://github.com/aybruh00/SonyHeadphonesClient/tree/xm4)

[ItsIsmailZ]

@mos9527 Oh and here I thought when buying them that my XM4 would've been a better choice and have more support since it's more expensive
What is a PR? And how do I build it? I'm not that tech-savvy haha

[mos9527]

What is a PR? And how do I build it? I'm not that tech-savvy haha

@ItsIsmailZ PR is the acronym for "Pull Requests", it's Github's way of handling code contributions from non-project maintainers. Building that fork on Windows is no different from building this one. See https://github.com/mos9527/SonyHeadphonesClient?tab=readme-ov-file#building for more info.

Do note that it's possible that the changes of the XM4 fork would go into Plutoberth's original. Though unfortunately that PR haven't seen much activity since Januray. In another word - you may wait a bit until that's eventually merged and a offical binary is released, or build the app itself if you'd like to use it now.

Btw, for more questions about the build process or the XM4s - please start new Issue threads with appropriate titles. It would be easier for others to find plus it's out of scope of this issue itself. Thanks in advance!