I have enabled A2DP offload and Mediatek Bluetooth workaround and that System BT HAL thingy. The audio still comes out of my phone's speaker even though the output is the Bluetooth device.
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I'm trying to figure out if any of my bluetooth devices support atpx for a higher quality sound. Is it possible in Android to see what codec is being used when streaming music/audio over bluetooth?
logcat, look for apt-x when connecting to apt-X enabled device
Sent from my HTC One
Post edited for quick answer.
I've confirmed that the Xiaomi Mi Mix supports both APTX and APTX HD. I'm running the 8.2.5.0 MAHMIDL global ROM without modification.
TL;DR
Equipment and software used:
Audio Technica ATH-DSR9BT Bluetooth headphones.
Xiaomi Mi Mix 256/6
Onkyo HF music player with pro unlock.
Laptop with Wireshark
Protocol:
Tap phone to headphones for NFC facilitated Bluetooth pairing with ATH-DSR9BT.
Verified pair by playing a FLAC file on phone and listened to playback on headphones.
Stopped music and turned off headphones.
From settings, developer options were activated by tapping the MIUI version (ROM build) several times.
Activated Bluetooth HCI Snoop log through:
Settings/Additional Settings/Developer Options/Bluetooth HCI Snoop Log (on)
Immediately turned the headphones back on, and played the same FLAC music file in Onkyo HF Player and listened to playback for about 8-10 seconds.
The ATH-DSR9BT headphones themselves feature status lights that indicate which CODEC is being used for playback. Indicator light 3 flashed purple every few seconds, which indicates that APTX HD is being used.
For absolute certainty, the HCI Snoop log from the phone was copied to a laptop and opened in WireShark for analysis. The Xiaomi Mi Mix and the ATH-DSR9BT negotiated a vendor CODEC (0x0024) where Qualcomm was the vendor. More specifically, the CODEC was verifiably set after it was exchanged in discovery as SEID audio sink 7. The CODEC was verifiably set via the set command recorded in the Snoop Log.
APTX was also offered, but wasn't selected as it is inferior to APTX HD.
In any case, that puts this question to bed. I suspect that this isn't an advertised feature because it may not have been officially implemented and could have been made available after release and after marketing material and specifications were already released.
Thanks, and get yourself some good headphones and enjoy Bluetooth audio on your Xiaomi Mix in high fidelity.
i quote a review detailled :
There’s also no aptX support here for high quality Bluetooth audio either, so Bluetooth headphone or car stereo users may want to look elsewhere for a higher quality wireless audio experience.
Click to expand...
Click to collapse
I'm not referring to out-of-the-box capability. I'm asking if there are ROMS that enable it because the hardware is already there.
Car audio comes across great on mine, wouldn't probably notice it if it had aptX ...
I've confirmed that it the Mi Mix supports both APTX and APTX HD. I'm running the 8.2.5.0 MAHMIDL global ROM without modification.
my bluetooth earphone is aptx supported and i connected my earphone and trying to activeaptx audio but SBC is default when i selected HWA it is not workig .and stereo audio left channel and right channel is not working it is steel mono audio .
I have a WH-CH700N Aptx-HD BT set from Sony. Worx fine out of the box (can see in the Sony Headphone app)
No need to install / configure in the OS
WH-CH700N supports SBC, AAC, aptX, aptX HD
Perhaps you need to install the app from the manufacturer. It is recommended for the sony
which BT headset do you have?
Meizu ep51 but sterio sarround not working
Meizu ep51 but sterio sarround not working
Hi, looks like it supports AptX but not Aptx-HD:
https://bluetoothcheck.com/a/meizu-ep52/meizu-ep51
If stereo is not working, then something else might be wrong.
Does a wired version work normally?
You might want to check your BT set on an other phone / tablet
Hi, While connected to the car Bluetooth - the phone calls works on car audio player. But the media audio ( saavn, youtube, miui music player etc) does not work. I cannot hear the song/audio on my phone or on car audio while connected to car Bluetooth. Any help pls. Device Xiaomi 11T , 12.5.9 MIUI Global ROM . Thanks
You could try a different Bluetooth codec. Your car audio might be using something different than system default for Android 11. AAC is my guess. The necessary options you'll find in developer settings. Or check the settings for your car in paired devices. You can turn on/off Absolute volume there which might help as well.
How to fix in-call bluetooth audio in Android 13? When I try to call in any app via BT hradset audio works in device but not in headset? Fix with "Use alternative way to detect headset + Force disable a2dp offload + Bluetooth workarounds" from Android 12 doesn't work.