How do I "force" AptX HD? - Sony Xperia X Performance Questions & Answers

yes, i have chosen the aptx HD option on the Dev options, but my bluetooth receiver only recognizes my phone as aptX. Why is that? Using a Radsone ES100 specifically

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Does the Apt-X codec is enabled on Razr I?

Hello everyone!
I suppose that doesn't work Apt-X codec when I heared music thru Bluetooth Samsung HS3000 (apt-X codec supported) and Motorola Razr I which support apt-x too. I rely on my ears and data from Catlog app (no data about aptx codec at all) now. I know that two divices (Razr I and HS3000) support apt-x and I suppose that apt-x is bloked on a software level in the phone.
Could you pls anyone share your experience on this direction? And if it is possible pls share your log file from Catlog app (like this) if you happen to find in it the "aptx"...
Also could you please share your /etc/bluetooth/audio.conf
View attachment logcat_and_device_info.zip
Hi Alexae!
I have just tried Sennheiser PX 210 BT, with which I have the option to try with wire as well. So I did listening to some flac and mp3 music on my laptop and on my Razr I. My laptop is a Fujitsu A530 not known to support aptx and there was an easily hearable difference between the wired and A2DP listening. With my Razr I I could not distinguish between wired or wireless. Although running the Catlog app I could not find any entry about aptx (as there is on the page you have linked). Only the A2DP protocol enabling is mentioned. I prefer not to share my log file for privacy reasons as I not aware of the information it can contain.
Hope it helps. I think we are lucky with this phone.
[UPDATE] Looking into Aptx further it seem it only comes with the Bluetooth 4.0 and the Razr I only supports 2.1. So from that the answer is there is NO Aptx support in the phone.

How to figure out what Bluetooth Codec your using?

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

APTX and APTX HD supported on Mi Mix

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.

note 8 bluetooth codec

i recently purchased oneplus bullets wireless earphones . so i was checking whether note 8 supports aptx codec or not.
I bumped into bluetooth streaming settings in developer options. Here many codecs were mentioned including aptx , LDAC and even samsungs own UHD . Which ever i select when i am not connected to my bluetooth earphones it automatically shifts to aptx when i connect to my bullets wireless (aptx compatable). Does this mean note 8 also supports sony's LDAC (HI-RES) ( correct me if i am wrong) codec . Has anyone tried checking?
Those settings are only showing you what's connected.
Sent from my SM-N950F using Tapatalk
Yes, LDAC is supported when using a compatible Sony bluetooth device. Attached is a screen shot of the bluetooth settings page of my MDR-1000X.
D_VIN_GADO said:
Yes, LDAC is supported when using a compatible Sony bluetooth device. Attached is a screen shot of the bluetooth settings page of my MDR-1000X.
Click to expand...
Click to collapse
so this CONNECT WITH LDAC APPEARS AFTER YOU CONNECT TO HI-RES COMPATABLE HEADPHONES?
Yes, but please keep it toned down with the All-Caps.

Lost LDAC and aptX-HD after September update

After I updated my g6 with the September Android security update, I lost the ability to switch the bluetooth codec to aptX-HD and LDAC.. The only thing I can choose is SBC or regular aptX.. I previously was using LDAC with my Sony headphones.. If I go in developer options and choose aptX-HD or LDAC, it just stays on regular aptX. Anyone else encounter this? Clicking the gear next to the headphones in bluetooth settings just allows me to check or uncheck the option "Use higher quality audio: aptX". Unchecking that switches it to SBC. Checking it just forces aptX.
Has anyone tried this?
https://forum.xda-developers.com/android/software/soundmod-ainur-audio-t3450516

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