[Sony Ericsson Xperia Neo, Pro] avinashrocks1990:
First of all this is a re-post i thought it might be helpful for the new users specially who are using aosp rom and are unable to use acid audio mod

Read the thread properly before complaning

Version: FX version 2.2.0.4 / XHiFi version 2.0.0.7

Codename: (FX version) Beautiful / (XHiFi version) X-Factor

Compiled date: March 20,2013 / March 20,2013 - Official Release

Operating environment: Android 2.3 / 4.0 / 4.1 / 4.2 (4.2 & MIUIv5 follow Compatibility Setup)

Hardware platforms: ARM (ARM11, Cortex A8/A9 or higher)

FX Minimum requirement (Convolver turned off): A8 300MHz or ARM11 500MHz

FX Minimum requirement (Convolver turned on): A8 single-core 800MHz, recommended dual-core or quad-core 1.2GHz

XHiFi Minimum requirement (All effects turned on): A8 dual-core 1GHz or higher, does not support Tegra2 processor

Language: English (United States) / Simplified Chinese / Traditional Chinese

Index:

1. OP

2. F.A.Q

3. Settings Explained & Recommended Settings for FX

4. Settings Explained & Recommended Settings for XHiFi

5. FIR Equalizer guide

6. CPU Type List - Which drivers to use?

Software Description:

V4A Settings explained & configuration handguide: http://xdaforums.com/show...php?p=39156718

How to use the FIR Equalizer? see: http://xdaforums.com/show...php?p=39156757

If Auto Installer fails, install Busybox and try again. Or else follow manual installation.

Note: To get the best compatibility with your rom, recommended manual installation.

NEW Compatible Mode:

Compatible Mode supports large variety of music players and the players' own EQ/sound effects (system-provided/third party)

1. In option, switch to Compatible Mode. Reboot, done.

NEW Safe Mode:

If V4A dont work on many players, try switching to Safe Mode to work with almost any music player.

1. In option, switch to Safe Mode. Done.

Latest version change log:

FX version: v2.2.0.5

1. Increase toolbox compatibility, improve In-app installation success rate.

2. Fix Continuous install/update popup when enter v4a app.

Note: 2005 only fixes the above bugs, there's no update on lib or effect, so users with 2004 working can skip this version.

FX version: v2.2.0.4 FIXED

NEW. FIXED INSTALLATION

1.CPU load optimization.

2.Add changelog view in menu.

3.Auto driver compatible install and update with ViPER4Android, no longer need to manually install.

4.Add driver safe mode. If you got no audio effect, you can try to switch to safemode.

5.Add normal and compatible mode. If you got no audio effect, you can try to switch to compatible mode.

6.Improve the stability of convolver.

7.Effect profile support save and load.

8.Improved UI interface and logic.

XHiFi version: v2.0.0.7

1.Add changelog view in menu.

2.Auto driver compatible install and update with ViPER4Android, no longer need to manually install.

3.Add driver safe mode. If you got no audio effect, you can try to switch to safemode.

4.Add normal and compatible mode. If you got no audio effect, you can try to switch to compatible mode.

5.Effect profile support save and load.

6.Improved UI interface and logic.

7.Tweak parameters of audio reconstruct.

8.Support TEGRA2 & ARMv5TE chip, both select "Tegra2" driver.

9.Installation process will use toolbox first.

For Poweramp users:

To use V4A with Poweramp properly, you need to follow the steps below.

Open Poweramp Settings -> Audio -> Advanced Tweaks -> Direct volume control -> Turned off.

To solve Poweramp volume too low after turning off Direct volume control:

Turn on V4A's PlaybackAGC, set strength to Medium/Extreme, set Max Gain to Infinity, set Max Output to 0db.

For system-provided music players (such as MIUI music player, Apollo etc.):

In these music players, turning on player equalizer will auto disable V4A, turning off will enable V4A.

Third-party players such as TTPOD and Poweramp have no such problems.

Tips:

To use XHiFi on speaker, use lock effect mode.

New Usage Terms & Condition Policy:

Starting from 1 April 2013, no one can include V4A FX nor XHiFi in their sound engine/sound mod or any work which is not a Rom.

You can only include V4A in Roms, but without any third party sound effects in the particular Rom in which you are featuring V4A.

Third party sound effects include audio effects/sound enhancers/sound panels which are not stock provided.

Example: BeatsAudio is considered third party sound effects to Sony Devices.

DSPManager / Awesome Beats / SRS Panel are also considered third party sound effects without doubt.

Downloads:

http://xdaforums.com/showthread.php?t=2191223

Don't install Fx and XHiFi together Neo V's processor isn't capable of handling both audio effects together

ViPER4Android (V4A) Audio Effects

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Translated and refined by zhuhang@xda

XDA Official Maintainer zhuhang@xda http://xdaforums.com/member.php?u=3901724