[Xiaomi Redmi 2 Guides, News, & Discussion] anandmore:
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Main Thread :

http://xdaforums.com/android/software/sound-mod-biohazard-android-infected-t3373888

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After installing the mod the only apps that you have to see in the drawer are BioHazard Audio FX, Yume Audio Dreamer and Viper4Android, The other mods are system files that are activated by default and works In every sound emitted, in all apps, and both in speaker headphones bluetooth etc.

Requirements :

Custom Recovery

Rooted ROM

Experience with root

Permissive Selinux (Use this app)

Make sure /system has 50mb+ of available free space.

Install Instructions :

Download Zip

Wipe Cache

Flash the Zip

Wipe Dalvik Cache

Reboot to system

BioHazard Audio FX not opening ?

Make sure Selinux is set to Permissive

And Perform a soft reboot.

Tested And Working On :

CM 13 & custom roms based on it.

MIUI lollipop roms

AOSP 6.0.1 & custom roms based on it.

CM 12.1 & custom roms based on it.

If you tried it on other roms and found it working then pls. post it here so i can add it in the list..

Download :

Unleash The Toxins !!

Previous Versions

Uninstall and Removal :

The best and easiest way to remove this and any other /system mod from your device is to dirty flash your rom after wiping System in TWRP. Before you begin, make sure you have a compatible rom zip on your internal storage as an OS will need to be installed. As long as you do not Factory Reset or check Data or Internal Storage, your data will be left intact but with a fresh /system partition.

Verify compatible rom zip is on device

Boot to recovery

Wipe > Advanced > System, Dalvik Cache, Cache

Mount > uncheck System

Install > current/compatible rom zip

Reboot !

Have some issues ?

Comment them down with following information :

Selinux Set to Permissive?

Busybox Installed?

Any other mod installed or was previously installed?

Device, ROM, Android Version?

Features/Changelog :

[B]Toxicity Level 3.1 (02/06/16) :[/B]
Codename : Armageddon
New Audio Engine: Harmotopia One
Removed Harmoforia Engine
Throttled normal bass to fix lagging problems
Heavybass Mode improved
No distortion on music anymore with 4.9152 ExaHz Oversampling (Highest Limit)
Yume Audio Dreamer is included to get a customizable MOD
Fix for many bugs which was on Project Desire
Removed all bloat which was on Project Desire

[B]Toxicity Level 3.0 (21/05/16) :[/B]
Added lot of cool stuff
SRS Audio
RHR-K SRC 1.H
DTS from Huawei P8
AM3D Zirene Audio Included
Oversampling 4.9152 PetaHz
Resampling 6144 Khz
Sony's Clearaudio+
Harmon Kardon
LG files
PMEE-HS and RHR+
MaxxAudio (Dual System)
Qualcomm HW effect
BeatsAudio
BoomSound
Dirac
Dolby Atmos Intelligent EQ and Sound Virtualizer
XLoud Library Effect
ASound (28224 Khz 64bit)
ClearAudio EQ
Forcing 24-64bit playback
CryRez and P2SE
Vibeforium and Harmonia
Harmoforia

[B]Toxicity Level 2.1 (19/05/16) :[/B]
Codename - Meteor
Audio Effects app is now BioHazard FX
Added HTC Beats libs
Themed BioHazard FX*
You can now see mod status in the FX
Bug fixes
Enjoy !

[B]Toxicity Level 2.0 (15/05/16) :[/B]
Codename - Meteor
Started from scratch.
Introducing Audio Effects app.
Now compatible with all the mods available in xda
Doesn't mess with your audio_effects.conf
Debloated the whole mod.
Now about ~5 Megabytes.
This is the real begining of this Disaster !!

[B]Toxicity Level 1.1 (12/05/16) :[/B]
Added two codenames - Apocalypse & Blizzard
Apocalypse uses ViPER 2.4.0.1
Blizzard uses ViPER 2.3.4.0
Removed Dolby Atmos™
Fixed some issues with Project Desire Audio FX app
Fixed some stability issues
Bug fixes

[B]Toxicity Level 1 (07/05/16) :[/B]
Initial Public Release
ViPER4Android included
Project Desire Engines included
DTS from Huawei P8 included
AM3D Zirene Audio included
Sony's ClearAudio+ & Library included
Harman Kardon included
LG Files included
Maxx Audio (Dual System) included
Qualcomm HW effects included
Beats Audio included
Boom Sound included
Dirac HD included
Dolby Atmos included
XLoud library effect included
ClearAudio EQ included