[G2 General] alex72:
ViPER4Android is just amazing experience for music lovers and greatly improves performance of our DAC. Original thread in Development and Hacking / Android Software Development received more than three million views and OP [MENTION=3901724]zhuhang[/MENTION] did amazing presentation in first couple posts. V4A developer is [MENTION=1569052]viper520[/MENTION].

Check it out! http://xdaforums.com/showthread.php?t=2191223

You got to be rooted and have SuperSU and BusyBox on your G2. It's reported that SuperSU plays nicely with ViPER4Android and Superuser could have some difficulties.

App will install drivers for you and make sdcard/ViPER4Android/Kernel folders in your main storage. Follow instructions from the app. Basically, just pick desired audio quality / battery consumption. Reboot. If ViPER4Android folders are not automatically created, see EDIT at the bottom of this post.

In sub-folder named Kernel extract IRS files from attachment (at the bottom of this post) or downloaded Starter Pack from OT. Reboot again. In order to see Convolver / Impulse Response (IRS) files, go to UI Setting and choose Expert option.

I removed some IRS files from original starter pack and cherry picked some more free IRS files from other packs.

Superb, free, studio quality, 6 (six) sets of IRS files in this thread by [MENTION=4877037]BSDgeek_Jake[/MENTION];

http://xdaforums.com/showthread.php?p=45462666

Check out another great IRS thread by [MENTION=3901724]zhuhang[/MENTION] and if you feel like it you could purchase some of his premium IRS packs to support V4A development;

http://xdaforums.com/showthread.php?p=45553399

Here's another awesome irs thread by [MENTION=5160317]Vinardo_ZzZ 2000[/MENTION];

http://xdaforums.com/showthread.php?p=52976760

It's geared towards more advanced V4A users. Have fun!

Most music players work with default Normal setting. If you're still on Jelly Bean (4.2.2) and have problems with Google Play Music or stock LG Music Player playing local mp3's with headphones or thru speaker you'll need to edit build.prop files. Instuctions in post #218;

http://xdaforums.com/showthread.php?p=47288003

If you have problems with driver installation when upgrading V4A to a newer version and V4A asks you to install drivers again and again, follow instructions in post#594 and #596;

http://xdaforums.com/showthread.php?p=52053808

... or much simpler solution is to flash one of [MENTION=4445176]guitardedhero[/MENTION] zips. I tested a few and they work great. I'm using his zips for all my phones... I'll keep testing his zips with each update so I'll update post #783 accordingly.

http://xdaforums.com/showthread.php?p=65131438

For KitKat users, who want to install V4A as system app, [MENTION=3371513]reas0n[/MENTION] wrote simple instructions... In addition, there are instructions on how to manually edit build.prop file if needed.

http://xdaforums.com/showthread.php?p=53280511

Much more detailed instructions and explanations you could find in original thread or at Viper's Audio Official Website.

Viper's Audio Official English Website link;

http://vipersaudio.com/blog/

DOWNLOAD

Open V4A FX Menu/Check Update. Download and install Android 4.x/5.0/6.0 apk.

For new users, download link for latest v2.4.0.1;

http://vipersaudio.com/swupdate/viper4android/download.html

Download page for all versions of ViPER's Audio;

http://vipersaudio.com/blog/?page_id=48

Official ViPER4Android Audio Profiles thread;

http://xdaforums.com/showthread.php?p=42584030

V4A IRS Headphone correction filters thread;

http://xdaforums.com/showthread.php?p=43809801

In this post is explanation of what it does;

http://xdaforums.com/showthread.php?p=43809820

I believe that's it. Enjoy!

EDIT;

In order to see Convolver / Impulse Response (IRS) files, go to UI Setting and choose Expert option.

"In the FX app, make sure Convolver is ticked. Then press Impulse Response and it will tell you the folder is empty. It JUST created the folder you are missing. Go back to your file manager and copy the files there." thanks to [MENTION=3105374]bri315317[/MENTION]