[Zenfone 5 Android Development] juyel92:
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*** I'M NOT RESPONSIBLE IF YOUR DEVICE IS NOT BOOTING UP, DEVICE IS BRICKED, GOT BOOTLOOPED OR WHATEVER ***​

*** DO AT YOUR OWN RISK ***​

*** READ AND UNDERSTAND EACH AND EVERY STEPS CAREFULLY BEFORE PROCEEDING ***​

The most commonly used Audio modification tool among the Android users is ViPER4Android. It has been making audio clearer and more perceptible on millions of Android devices out there. Today here, I will be guiding you on how to Install ViPER4Android on any ROM in your devices.

After months and months of no activity, the Viper4Android developer zhuhang has finally announced the official 2.5.0.5 update. While primarily, the update aims at enabling users to install ViPER4Android on Nougat 7.x.x, it also incorporates some new features.

CHANGELOG:
New App icon, package name, and UI
Added cross-channel (“quad channel”) convolver support.
This allows faithful reproduction of sound-field effects requiring such cross-channel convolution, such as simulation of speaker soundfield on headphones, or crosstalk cancellation (stereo widening) on stereo speakers.
Added FET compressor (new compressor / limiter simulating operation of FET circuits)
Support for custom settings storage path (no more looking everywhere in the phone for the settings directory!)
Miscellaneous bug fixes.

BUILD INFORMATION:
Version: FX version 2.5.0.5 (active)
Codename: (FX version) Beautiful
Compiled date: September 1,2016 / September 4,2013 – Official Release
Operating environment: Android 2.3 / 4.0 / 4.1 / 4.2 / 4.3 / 4.4 / 5.0 / 6.0 / 7.0/7.1/7.1.2
CPU platforms: ARM (ARM CortexA8 or higher), x86(Atom/i3/i5/i7)
Language: English (US) / Simplified Chinese / Traditional Chinese / more

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Warning -

Installing incorrect/incompatible mods on your Android device could be harmful. Please make sure that you are aware of the outcome and don’t forget to take a Nandroid backup of your current ROM before proceeding. DroidOrigin or any of its members shall not be held liable for any damage to your device. However, if you’re stuck, we will still try to pull you out of any troubles.[/CENTER]

Installing Viper4Android is pretty simple, given that you meet the requirements pre-hand. If you have found yourself in a sticky situation, then the steps below could be of help too.

Requirement -

Rooted Device.

TWRP recovery.

BusyBox 1.26.2

ES File Explorer or Any Root File Browser.

NOTE :​

There are two files provided in the download section below. One is for manually installing and another one is for directly flashing through twrp. Please download any one file whichever you want and then follow the correct steps for that file only. Before proceeding, please check whether you have downloaded the manual installation file or flashable file. If you have downloaded the manual installation file then follow the procedures for manually installing the app & drivers and if you have downloaded the flashable zip file then follow the procedures for flashing the zip file through TWRP and then installing the driver.​

Steps For Manually Installing ViPER4Android in your device-

1. Now that you have everything setup correctly, download the official ViPER4Android for Nougat (FX 2.5.0.5) from below.

2. Extract the downloaded zip and it will contain two apks –

ViPER4Android_FX_v2505_A4.x-A7.x.apk

ViPER4Android_FX_v2505_A7.x_Nougat_IO_test_fix.apk

3. Since we are going to install Viper4Android on Nougat, we will just need the “ViPER4Android_FX_v2505_A7.x_Nougat_IO_test_fix.apk” file.

4. If you have downloaded it to your PC instead, just transfer the apk to your phone’s storage.

5. Before we head to the installation, open the ES File Explorer and grant it root permissions when prompted.

6. Open ES File Explorer and browse to the location where the apk is present. Copy the “ViPER4Android_FX_v2505_A7.x_Nougat_IO_test_fix.apk” file and move it to “/system/priv-app“.

7. We are not done yet. Long-press the file, tap on the 3-dot overflow button, and select Properties. And set its permission to -rw-r–r–, and select APPLY.

8. Reboot your device now.

9. Now go to the app drawer and run the ViPER4Android FX app. When you are asked for storage permissions, make sure to grant them.

10. A prompt will display for driver installation. Select Yes to confirm the driver installation process. You will also need to allow Superuser (root) permissions to the app.

11. Your phone’s screen may freeze, don’t worry just wait and do not exit the app. Your android system will popup that app is not responding, just press wait button. Let the app finish it's driver installation, so don't exit the app now. When the installation is successful, you will get a message. Tap OK and reboot your device.

When your device reboots, you will have completely functional ViPER4Android on Nougat and other Android versions.

If you have trouble in driver installation, read the troubleshooting section below or comment right away.

Steps For Installing ViPER4Android through TWRP in your devices

1. Download the flashable zip file from below (Filename - ViPER4Android_2.5.0.5 (Flashable))

2. Reboot to recovery.

3. Flash the ViPER4Android_2.5.0.5 (Flashable).zip file.

4. Reboot system.

5. When device is booted up properly, then open the ViPER4Android app.

6. If it will ask root permission then grant the root permission.

7. It will popup a message for installing the driver. Just tap ok and wait for installing the driver.

8. Your phone’s screen may freeze, don’t worry just wait and do not exit the app. Your android system will popup that app is not responding, just press wait button. Let the app finish it's driver installation, so don't exit the app now. When the installation is successful, you will get a message. Tap OK and reboot your device.

When your device reboots, you will have completely functional ViPER4Android on Nougat and other Android versions.

NOTE : PLEASE DISABLE YOUR DEFAULT MUSICFX OR AUDIOFX IN ORDER TO USE ViPER4AndroidFX​

Credits -

zhuhang for developing the ViPER4Android

ViPER4Android Team

and many more.

(If I have missed anyone's name then please PM me for that)

You can download the ViPER4Android FX_version2.5.0.5 from below. Please follow the steps properly otherwise you will end up with problems.