aptX on note4 possible? - Xiaomi Redmi Note 4 Questions & Answers

ive read conflicting reports.. some saying that its physically impossible on snapdragon 625 devices, and others stating that its possible on unsupported devices with specific roms. Anyone care to shed some light for me?

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aptX is a proprietary codec; inclusion to a device requires the vendor to pay licensing fees to Qualcomm. So, if vendor doesn't do that, we shouldn't do it either.
Sent from my Redmi Note 4 using XDA Labs

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Yes,it is possible. I had aptX working on nougat but it just refuses to work on oreo for some reason.
If you re on nougat just look up for aptx.zip somewhere on xda ..oneplus 3 forums if I remember corectly.

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ok understood!
ive just built a nice new high end soundsystem, and included an apt-x bluetooth receiver.. would be a crying shame if my phone didnt support it. I ordered this phone 2 days ago, assuming casually that all modern bluetooth devices would support aptx.

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Nope,they actually don't. There are many new/old phones(even flagships) that don't support APTX
I've got aptx working on oreo as well. You just have to flash a custom rom and then flash aptx from here : https://forum.xda-developers.com/on...-aptx-aptxhd-oreo-beta-25-16-op-3-3t-t3690363

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Thanks everyone. seems positive.
one thing i dont understand. if its just a codec, which needs licensing, why do qualcomm specify it as only being supported by certain cpus?
see here under "audio technology" :
https://www.qualcomm.com/products/snapdragon/processors/comparison
snapdragon 625 notably doesnt list aptx

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Robert- said:
Yes,it is possible. I had aptX working on nougat but it just refuses to work on oreo for some reason.
If you re on nougat just look up for aptx.zip somewhere on xda ..oneplus 3 forums if I remember corectly.
Click to expand...
Click to collapse
On miui or lineage?

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jimger said:
On miui or lineage?
Click to expand...
Click to collapse
It works on both. There's a Magisk module for that

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I have tried one on miui nougat and doesn't seem to work
Noter2017 said:
It works on both. There's a Magisk module for that
Click to expand...
Click to collapse
Sent from my Redmi Note 4 using Tapatalk

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aptx working solution on Redmi Note 4 (india) snapdragon
robinlawrie said:
ive read conflicting reports.. some saying that its physically impossible on snapdragon 625 devices, and others stating that its possible on unsupported devices with specific roms. Anyone care to shed some light for me?
Click to expand...
Click to collapse
[Aptx was already working on my Redmi 2, 8GB ROM, 1GB RAM (Model HM 2014811) after installing CM 14.1 & Aptx through TWRP, (but it was not working on MIUI 6, CM11)]
In case of Redmi Note 4 the following method is successful.
Existing conditions:
Phone: Redmi Note 4 (India, i.e. Snapdragon), MIUI 10 from mido_global_images_8.7.26_20180726.0000.00_7.0_global_9529295baa.tgz
Fresh installed without setting any screen lock, password, finger print , google account Mi account (this is suspected to lead to data corruption, if it happens we have to flash above MIUI10 full fastboot ROM again, hence all files better to be saved on external SD Card)
Windows : Windows 10 v1707, 64 bit , Pda net installed.
Apps / programs required : may be googled and downloaded
Major Activities Involved
A. Unlocking of boot loader
B. (i) Installation of TWRP v3.2.2.0-mido.img (recovery suitable to Redmi Note 4 SnapDragon)
(ii) Installation of [Mido][Material][Twrp-Treble][3.2.1-10].zip (recovery suitable to Redmi Note 4 SnapDragon by Jairus980)
C. (i) Installation of lineage-15.1-20180807-nightly-mido-signed.zip (ROM suitable to Redmi Note 4 SnapDragon)
(ii) Installation of open_gapps-arm64-8.1-nano-20180812.zip (gapps suitable to arm64)
(iii) Installation of Magisk-v16.7_Bundle.zip (both magisk & magisk manager for getting rooted)
(iv) Installation of REVOLT.EAS-R13-20180722-2040.zip (kernel after 20.07.2018)
(v) Installation of aptX-oreo.zip
(vi) Installation of Apt-X_HD_Port_by_androidexpert35.zip
(vii) Installation of aptX-HD_OreoEnabler.zip
(viii) Installation of lazyflasher-no-verity-opt-encrypt.zip (for no-verity-opt-encrypt)
A. Unlocked boot loader
Official method (The process is simplified and the permission is granted automatically. You don't have to fill in any application form or wait for the SMS anymore)-successful on my Redmi Note 4 SD.
1. Settings---> About phone---> MIUI Version (Keep tapping it to enable developer option).
2. Settings---> Additional settings---> Developer option and bind your approved Mi account under Mi Unlock Status.
3. Go to https://en.miui.com/unlock/ and click on unlock now , change english , log in to mi your account (on pc_) , Download mi unlock to pc, unzip it , open mi unlock (on PC) log into the Mi account which has acquired unlocking permission on your device.
4. When you logged into the Mi Unlock Tool, tap on the top right gear icon to check the update for both USB driver and Mi Unlock Tool. Make sure you're running the latest version.
5. Turn off your device, press the Power button and Volume - button at the same time to enter bootloader mode
6. Log into the unlocking tool on PC with the same Mi account. Connect the device to the PC using USB cable
7. Press 'Unlock'. Press Unlock anyway, The unlocking process will complete in about 10 seconds (sr no 4, 5, 6 & 7 repeated twice, as unlocking hanged at 99% )
B. (i) Installation of TWRP (img file)
1. Install minimal_adb_fastboot_v1.4_setup.exe on PC and note down the installed directory.
2. Copy twrp v3.2.2.0-mido.img (recovery suitable to Redmi Note 4 SnapDragon) to above directory and rename it to recovery.img (all small letters without any spaces in between) or any other name for the sake of easiness.
3. Bring the Phone to fastboot (i.e. bootloader) mode (method: while the phone is in switched off condition press volume down and power button simultaneously still the phone is entered into fastboot mode [Bunny picture appears])
4. Launch Minimal ADB and Fastboot on PC execute command
fastboot flash recovery recovery.img
5. Press and hold volume up and power button simultaneously but release only power button after 8 to 15 seconds of restart and appearance mi logo and release volume button after TWRP appears.
(ii) Installation of TWRP by Jairus980
1. Install [Mido][Material][Twrp-Treble][3.2.1-10].zip (recovery suitable to Redmi Note 4 SnapDragon by Jairus980) and wipe catche
2. Press and hold volume up and power button simultaneously but release only power button after 8 to 15 seconds of restart and appearance mi logo and release volume button after TWRP Recovery Project (i.e. TWRP by Jairus980) appears.
C. (i) wipe>advanced>select all except internal storage>wipe
(ii) Install “ lineage-15.1-20180807-nightly-mido-signed.zip” (ROM suitable to Redmi Note 4 SnapDragon) and wipe catche
(iii) Install “open_gapps-arm64-8.1-nano-20180812.zip” (gapps suitable to arm64) and wipe catche
(iii) Install “Magisk-v16.7_Bundle.zip” (both magisk & magisk manager for getting rooted) and wipe catche
(iv) Install (only after installation magisk) “REVOLT.EAS-R13-20180722-2040.zip” (kernel after 20.07.2018) and wipe catche
(v) Install (only after installation magisk) “aptX-oreo.zip” and wipe catche
(vi) Install (only after installation magisk) “AptX_HD_Port_by_ androidexpert 35.zip” and wipe catche
(vii) Install (only after installation magisk) “aptX-HD_OreoEnabler.zip” and wipe catche
(viii) Install at last but very important “lazyflasher-no-verity-opt-encrypt.zip” (for no-verity-opt-encrypt to be installed at last to avoid any over writing) and wipe catche
Reboot system
It will restart once, if taking more time switch off and switch on once
After the phone is on, click 7 times on build number to enable Developer options (settings>about phone> build number)
Redmi Note 4 SD Oreo 8.1 connected to Avantree Oasis (restart phone if any Bluetooth connection problem happens) in AptX mode can be seen picture
Not yet checked, but expect it will function even if unrooted.

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Final success APTX Working with MIUI itself
knreddy said:
[Aptx was already working on my Redmi 2, 8GB ROM, 1GB RAM (Model HM 2014811) after installing CM 14.1 & Aptx through TWRP, (but it was not working on MIUI 6, CM11)]
In case of Redmi Note 4 the following method is successful.
Existing conditions:
Phone: Redmi Note 4 (India, i.e. Snapdragon), MIUI 10 from mido_global_images_8.7.26_20180726.0000.00_7.0_global_9529295baa.tgz
Fresh installed without setting any screen lock, password, finger print , google account Mi account (this is suspected to lead to data corruption, if it happens we have to flash above MIUI10 full fastboot ROM again, hence all files better to be saved on external SD Card)
Windows : Windows 10 v1707, 64 bit , Pda net installed.
Apps / programs required : may be googled and downloaded
Major Activities Involved
A. Unlocking of boot loader
B. (i) Installation of TWRP v3.2.2.0-mido.img (recovery suitable to Redmi Note 4 SnapDragon)
(ii) Installation of [Mido][Material][Twrp-Treble][3.2.1-10].zip (recovery suitable to Redmi Note 4 SnapDragon by Jairus980)
C. (i) Installation of lineage-15.1-20180807-nightly-mido-signed.zip (ROM suitable to Redmi Note 4 SnapDragon)
(ii) Installation of open_gapps-arm64-8.1-nano-20180812.zip (gapps suitable to arm64)
(iii) Installation of Magisk-v16.7_Bundle.zip (both magisk & magisk manager for getting rooted)
(iv) Installation of REVOLT.EAS-R13-20180722-2040.zip (kernel after 20.07.2018)
(v) Installation of aptX-oreo.zip
(vi) Installation of Apt-X_HD_Port_by_androidexpert35.zip
(vii) Installation of aptX-HD_OreoEnabler.zip
(viii) Installation of lazyflasher-no-verity-opt-encrypt.zip (for no-verity-opt-encrypt)
A. Unlocked boot loader
Official method (The process is simplified and the permission is granted automatically. You don't have to fill in any application form or wait for the SMS anymore)-successful on my Redmi Note 4 SD.
1. Settings---> About phone---> MIUI Version (Keep tapping it to enable developer option).
2. Settings---> Additional settings---> Developer option and bind your approved Mi account under Mi Unlock Status.
3. Go to https://en.miui.com/unlock/ and click on unlock now , change english , log in to mi your account (on pc_) , Download mi unlock to pc, unzip it , open mi unlock (on PC) log into the Mi account which has acquired unlocking permission on your device.
4. When you logged into the Mi Unlock Tool, tap on the top right gear icon to check the update for both USB driver and Mi Unlock Tool. Make sure you're running the latest version.
5. Turn off your device, press the Power button and Volume - button at the same time to enter bootloader mode
6. Log into the unlocking tool on PC with the same Mi account. Connect the device to the PC using USB cable
7. Press 'Unlock'. Press Unlock anyway, The unlocking process will complete in about 10 seconds (sr no 4, 5, 6 & 7 repeated twice, as unlocking hanged at 99% )
B. (i) Installation of TWRP (img file)
1. Install minimal_adb_fastboot_v1.4_setup.exe on PC and note down the installed directory.
2. Copy twrp v3.2.2.0-mido.img (recovery suitable to Redmi Note 4 SnapDragon) to above directory and rename it to recovery.img (all small letters without any spaces in between) or any other name for the sake of easiness.
3. Bring the Phone to fastboot (i.e. bootloader) mode (method: while the phone is in switched off condition press volume down and power button simultaneously still the phone is entered into fastboot mode [Bunny picture appears])
4. Launch Minimal ADB and Fastboot on PC execute command
fastboot flash recovery recovery.img
5. Press and hold volume up and power button simultaneously but release only power button after 8 to 15 seconds of restart and appearance mi logo and release volume button after TWRP appears.
(ii) Installation of TWRP by Jairus980
1. Install [Mido][Material][Twrp-Treble][3.2.1-10].zip (recovery suitable to Redmi Note 4 SnapDragon by Jairus980) and wipe catche
2. Press and hold volume up and power button simultaneously but release only power button after 8 to 15 seconds of restart and appearance mi logo and release volume button after TWRP Recovery Project (i.e. TWRP by Jairus980) appears.
C. (i) wipe>advanced>select all except internal storage>wipe
(ii) Install “ lineage-15.1-20180807-nightly-mido-signed.zip” (ROM suitable to Redmi Note 4 SnapDragon) and wipe catche
(iii) Install “open_gapps-arm64-8.1-nano-20180812.zip” (gapps suitable to arm64) and wipe catche
(iii) Install “Magisk-v16.7_Bundle.zip” (both magisk & magisk manager for getting rooted) and wipe catche
(iv) Install (only after installation magisk) “REVOLT.EAS-R13-20180722-2040.zip” (kernel after 20.07.2018) and wipe catche
(v) Install (only after installation magisk) “aptX-oreo.zip” and wipe catche
(vi) Install (only after installation magisk) “AptX_HD_Port_by_ androidexpert 35.zip” and wipe catche
(vii) Install (only after installation magisk) “aptX-HD_OreoEnabler.zip” and wipe catche
(viii) Install at last but very important “lazyflasher-no-verity-opt-encrypt.zip” (for no-verity-opt-encrypt to be installed at last to avoid any over writing) and wipe catche
Reboot system
It will restart once, if taking more time switch off and switch on once
After the phone is on, click 7 times on build number to enable Developer options (settings>about phone> build number)
Redmi Note 4 SD Oreo 8.1 connected to Avantree Oasis (restart phone if any Bluetooth connection problem happens) in AptX mode can be seen picture
Not yet checked, but expect it will function even if unrooted.
Click to expand...
Click to collapse
Mobile OS: MIUI 10 Global 8.7.26 Beta or MIUI 9 V9.0.5.0.NCFMIEI_20171113.0000.00_7.0
Android 7.0
Phone Model : Redmi Note 4 (India) Snapdragon, 4GB RAM, 64GB ROM = Redmi Note 4X
PC Windows 10 64 bit
1) MIUI 10 Global 8.7.26 Beta Fastboot ROM was flashed after boot unlocked in fastboot mode
{there was trouble in unlocking the bootloader after mainboard replacement due to weak IR blater, with MIUI 9 can't verify account and in MIUI 10 error 20091 etc but solved by installing MIUI 8 (mido_global_images_V8.2.4.0.MCFMIDL_20170407.0000.00_6.0) immediately account was bound and after 72 hours it was possible to unlock , during this period flashing was done on test point mehod as deep flash also locked and it cannot boot with MIUI 7}
2) twrp-3.2.2-0-mido flashed in fastboot mode & immediately entered into Recovery mode (twrp) (Do not boot to android otherwise MIUI will replace twrp recovery with original recovery)
3) installed Magisk-v16.7_Bundle.zip at TWRP
4) Installed APTX-enabler-twrp.zip at TWRP
5) Installed lazyflasher-no-verity-opt-encrypt.zip (to avoid boot loop or replacement twrp with original recovery file)
Now Phone is booted to system , first time android starting took time
6) magisk app opened and Magisk16-Nougat-AptX.zip installed with Add Module section
Rebooted Android
NOW APTX STARTED WORKING ON REDMI NOTE 4 MIUI 10 or MIUI 9
most of the credit goes to participants at 4PDA

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knreddy said:
Mobile OS: MIUI 10 Global 8.7.26 Beta or MIUI 9 V9.0.5.0.NCFMIEI_20171113.0000.00_7.0
Android 7.0
Phone Model : Redmi Note 4 (India) Snapdragon, 4GB RAM, 64GB ROM = Redmi Note 4X
PC Windows 10 64 bit
1) MIUI 10 Global 8.7.26 Beta Fastboot ROM was flashed after boot unlocked in fastboot mode
{there was trouble in unlocking the bootloader after mainboard replacement due to weak IR blater, with MIUI 9 can't verify account and in MIUI 10 error 20091 etc but solved by installing MIUI 8 (mido_global_images_V8.2.4.0.MCFMIDL_20170407.0000.00_6.0) immediately account was bound and after 72 hours it was possible to unlock , during this period flashing was done on test point mehod as deep flash also locked and it cannot boot with MIUI 7}
2) twrp-3.2.2-0-mido flashed in fastboot mode & immediately entered into Recovery mode (twrp) (Do not boot to android otherwise MIUI will replace twrp recovery with original recovery)
3) installed Magisk-v16.7_Bundle.zip at TWRP
4) Installed APTX-enabler-twrp.zip at TWRP
5) Installed lazyflasher-no-verity-opt-encrypt.zip (to avoid boot loop or replacement twrp with original recovery file)
Now Phone is booted to system , first time android starting took time
6) magisk app opened and Magisk16-Nougat-AptX.zip installed with Add Module section
Rebooted Android
NOW APTX STARTED WORKING ON REDMI NOTE 4 MIUI 10 or MIUI 9
most of the credit goes to participants at 4PDA
Click to expand...
Click to collapse
if i use magisk v18, may it work?

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BadassBancho said:
if i use magisk v18, may it work?
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Click to collapse
Make sure you have an aptX compatible device too.

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OverLord2901 said:
Make sure you have an aptX compatible device too.
Click to expand...
Click to collapse
My phone is redmi note 4x, but i was already installed magisk v18