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[APP] Official ViPER4Android Audio Effects (FX v2.5.0.5) - New Features & 7.0 Support

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Jesus is God Almighty

Senior Member
Aug 19, 2016
322
22
I wanna try this on my LG V20 that also seemed to have issues getting it to work. Would be nice if it worked - although it is incredible how slow this old mobile has become even. Pretty fresh rooted phone but they have there ways of ruining the speed of older mobiles so one needs to buy a new "modern" one.
Anyway, would be nice if I could boost my sound overall on the mobile as well.

I'm rebooting now... And then I need another reboot after the installation of the driver install and then hopefully it will work. Thanks for the Link :p

I think my LG V20 was running better with that foreign system from an variation, at least it is hit pretty hard on the benchmark compared to the normal unrooted V20.

Driver being installed... Granting admin... Rebooting... Uhhhhh.... I think it will work but you never know. Would be awesome just to squeeze out a little from the speaker all round the phone volume.

I wrote to Top Commander on his boosting in his video player asking if it is possible doing it to the whole system in root. Awaiting response.

Okay started up.... lets see! :)

IT WORKS!!! Although then the booster in the media player should not work anymore in Total Commander... But now I have an overall boost of the speaker so that might be worth it overall. It's not much, but a little is absolutely better then nothing! ;)

Wonderful working file. So it works both for Android 8 LG V20 and Android 10 Shift 6mq.
 

krilok

Senior Member
Sep 2, 2010
599
189
Xiaomi Poco F1
Redmi Note 9 Pro
Tried the android 11 magisk zip, and yes, V4A installs fine and seems to be working
At least for a while, though, because if I'm not playing any music and phone is locked and not being used, V4A shuts itself off for no apparent reason, and when I reopen it, processing status will display as abnormal. However, if I then toggle "attach audio effects" on and off, it will start processing again...

I've disabled battery optimisation for V4A, but abnormal status still happens. I've tried reinstalling but again, works at first but will stop processing after a while. No other audio mods, modules or eq's are installed, so I can't really pinpoint where the problem may be...

Anyone else on the same boat? Any suggestions? Thanks in advance..
 

DiamondJohn

Recognized Contributor
Aug 31, 2013
5,601
5,385
Sydney
Tried the android 11 magisk zip, and yes, V4A installs fine and seems to be working
At least for a while, though, because if I'm not playing any music and phone is locked and not being used, V4A shuts itself off for no apparent reason, and when I reopen it, processing status will display as abnormal. However, if I then toggle "attach audio effects" on and off, it will start processing again...

I've disabled battery optimisation for V4A, but abnormal status still happens. I've tried reinstalling but again, works at first but will stop processing after a while. No other audio mods, modules or eq's are installed, so I can't really pinpoint where the problem may be...

Anyone else on the same boat? Any suggestions? Thanks in advance..
I am not in the same boat. One of the things I do, is that I start Viper and my music player using a script, off the icon, and as part of that script, it explicitly starts viper, sets the OOM to "superman", sets the priority to high, and then starts the music player and does the same, and then it starts playing the music. I also have it start navigation as I mostly use it as my stereo when driving. I have been doing the above since about Gingerbread.
 
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tweakradje

Senior Member
Mar 18, 2005
1,071
539
Android
sites.google.com
Just a quick note for Xiaomi MIU users. If you want to keep the Viper4Android service to stay in memory there is only one way to do this:

Start Viper4Android GUI, click Android "recent apps" button to view the apps, Long click Viper4Android GUI, click the Lock icon. It will stay in RAM forever.

Notifications on/excl from battery management etc kills the process/service every few hours. Hope this helps someone.

Cheers
 

mmarcz

Senior Member
Nov 22, 2006
126
39
Just want to say thank you for everyone in the thread pointing me in the right direction.

I have a Pixel 4a 5G, and I have the latest viper installed through Magisk. Everything worked fine except that I could not get viper to see the Kernel folder or the IRS samples, hence no convolver. Im using the tracks_warm.irs, as it is transparent tone wise, but just gives a general warmth to the sound, which sounds great and lower and higher volumes. Im also streaming primarily from Apple Music, on full lossless, where the DAC comes into play, as mentioned below.

What I ended up doing was using total commander to set the permissions of the Kernel folder and the IRS sample to RWX RX RX and that fixed it. Ill have to check it on BT once I get on the car, but it looks good to go.

Im a longtime Viper user, and specifically bought my pixel from google to guarantee an unlocked bootloader from the very start, just to be able to run Viper. Once you've gone Viper, you can never go back.

Also, I picked up an External bluetooth adapter that has its own dedicated DAC, the output is 3.5mm that goes into that port in the car. I run that into a ground loop isolator before going into the AUX input. Its as clean and noiseless as straight bluetooth. The BT DAC is APT-X of course, so you're giving your music the maximum available bandwidth. Between Viper and the DAC, car audio is something incredible, it really pushes my stock car audio to the limit.

Wanted to post this in case anyone else was having the same issue or a similar issue.

Keep up the good work!
mmarcz
 

wasim9283

Senior Member
May 23, 2013
731
98
DOHA
Samsung Galaxy S20
Once you used viper, you will never come back,,, perfect.
But I have been using earlier, but now i want to keep my phone rootless (to be able to use banks and govt apps) any way, any idea any advice or help appreciated for using viper without losing important apps but with surity (I knew some root hide ways Earley but those have to keep updating, extreme care, so can get back from govt apps)
I'm currently using s20 plus newly bought,,,, all defaults.
 

iwearthebelt

Senior Member
Aug 2, 2012
247
78
Chandler, AZ.
Google Pixel 4a 5G
Hello, does anyone know if or how to get android auto to use phone viper eq settings in a vehicle when connected via USB? Or if there is a version that allows this on oneplus 6t oxygen running Android 11?
I'm not currently rooted, but in the past when I had my devices rooted I would use Magisk manager to hide root access (with Magisk Hide) from certain apps to be able to use them. This allowed root access and I was also able to use apps that wouldn't work with root privileges. Hope this helps or you figured it out by now.
 
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scorpio76r

Senior Member
Jan 10, 2016
1,255
469
All over like street lights
I'm not currently rooted, but in the past when I had my devices rooted I would use Magisk manager to hide root access (with Magisk Hide) from certain apps to be able to use them. This allowed root access and I was also able to use apps that wouldn't work with root privileges. Hope this helps or you figured it out by now.
I already have it enabled for viper. It's a no-go. I have since upgraded my car audio system so I fix it that way. Thanks for getting back though.
 

Obleon99

Senior Member
Jul 7, 2013
101
39
Genova
Hi guys, i've a oneplus 7 with stock rom and i installed the viper module through magisk. when i listen music with the screen locked the sound is laggy and the songs are heard intermittently. this happens everytime... is there any fix for this? thank you
 

jays note 2

Senior Member
Mar 10, 2015
217
69
42
Silverdale, Auckland, New Zealand
yep, tried it but viper still not available.

tried on two different device
• Poco M3
• Remi Note 10 pro

both device on PixelPlus UI custom rom.
and viper not working on both device.
How was viper installed? Magisk? Or zip via twrp?
I know from past experiences that if you install the zip via twrp it tends to play up.
When I installed on my Note 9 running Noble 1.5 I used Magisk.
With Magisk when it gets installed don't reboot, go straight too viper it'll ask for root permissions then it'll install its drivers then reboot when done.
 

gothed

Senior Member
Dec 24, 2013
587
101
Yogyakarta
POCO M3
How was viper installed? Magisk? Or zip via twrp?
I know from past experiences that if you install the zip via twrp it tends to play up.
When I installed on my Note 9 running Noble 1.5 I used Magisk.
With Magisk when it gets installed don't reboot, go straight too viper it'll ask for root permissions then it'll install its drivers then reboot when done.
i flashed the module from magisk, dunno if we can flash it directly via recovery.


but, which file that we use if we want to flash it via recovery?

is it similar one that we downloaded from magisk?
 

gothed

Senior Member
Dec 24, 2013
587
101
Yogyakarta
POCO M3
anyway, tried V4a using methods below

• Install v4a directly from magisk, v4a not working
• Take the zip and install v4a from recovery (i use official orangefox) and again v4a not appear after flashed
• Install v4a zip from recovery + install from magisk, v4a appear on device but not working too
• Legacy and compatibility mode activated, v4a not working

Tested on Poco M3 and Redmi Note 9 pro.
both device using official PixelPlusUI running android 11.
Screenshot_20210918-080810945.jpg
 

DiamondJohn

Recognized Contributor
Aug 31, 2013
5,601
5,385
Sydney
anyway, tried V4a using methods below

• Install v4a directly from magisk, v4a not working
• Take the zip and install v4a from recovery (i use official orangefox) and again v4a not appear after flashed
• Install v4a zip from recovery + install from magisk, v4a appear on device but not working too
• Legacy and compatibility mode activated, v4a not working

Tested on Poco M3 and Redmi Note 9 pro.
both device using official PixelPlusUI running android 11.
...snip...
The attachment to this post, installed as/via magisk module, works for me and all I have seen that have tried it under A11.

I havent read all your post, but I would start with cleaning all you have done before. ie magisk modules and installed apps.
 
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gothed

Senior Member
Dec 24, 2013
587
101
Yogyakarta
POCO M3
The attachment to this post, installed as/via magisk module, works for me and all I have seen that have tried it under A11.

I havent read all your post, but I would start with cleaning all you have done before. ie magisk modules and installed apps.
it worked flawlessly.

thanks for the help!
 

DiamondJohn

Recognized Contributor
Aug 31, 2013
5,601
5,385
Sydney
it worked flawlessly.

thanks for the help!
This zip (not created by me) has been flawless for all I know who have tried it at installing Viper on A11. The only thing you may wish to add is a switch to SELinux enforcing. It DOES run enforcing, but I *think* you have to boot permissive Somewhere in this or a related thread, I posted one option to have this happen automatically.
 
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    it worked flawlessly.

    thanks for the help!
    This zip (not created by me) has been flawless for all I know who have tried it at installing Viper on A11. The only thing you may wish to add is a switch to SELinux enforcing. It DOES run enforcing, but I *think* you have to boot permissive Somewhere in this or a related thread, I posted one option to have this happen automatically.
  • 3677
    [APP] Official ViPER4Android Audio Effects (FX v2.5.0.5) - New Features & 7.0 Support

    If you want to share at another forum, do not include download links, redirect them to download here.

    To ROM Makers who already included or wish to include V4A in your ROM. Click HERE.

    Donations intended for V4A Development, please DO NOT send to [email protected]
    V4A Project Donation account not available yet.

    Sticky News
    Development Progress: Inactive
    Remarks:-
    Past events:
    21 Jan 2013 (Alert - Illegal V4A Theft / V4A Clone)
    Recently, we found an android PAID app very similar to ViPER4Android.
    Judging by the screenshots, its definitely a copy of our app.
    We will do an investigation on this following paid app.


    Please do not mistaken this above app as V4A. ViPER4Android is always free. Do not fall for this and do not buy it.

    Help to share this post to alert others.

    16 October 2013
    Hello everyone!

    Now, our website is ready! You can now register as a subscriber here.

    Celebrating the launch of our website, ViPER4Windows also officially released.
    Head over to ViPER4Windows page for description and instructions.

    You can download all ViPER related contents at downloads page. This includes the V4A, V4W and IRS at the moment.

    12 October 2013
    Our English website is in progress. Its a wordpress based website. Its up, but not ready with posts. We'd be very busy lately so we do not have time to write pages and posts.
    Here's the link: http://www.vipersaudio.com/blog

    You can register an account at our website and make comments on our news and posts there. Right now, registration is disabled. We will make announcement when its ready. Cheers.

    6 October 2013
    - Added v2.3.0.1 FAQ (OP#3)
    - Added proper bug report instructions (OP#3)
    - Updated bug list (OP#3)
    - Updated troubleshooting for v2.3.0.1 (OP#3)
    - Updated General FAQ (OP#3)
    - Updated requirement for Rom makers (OP#5)
    - Updated OP index (OP#1)

    30 September 2013
    Whole OP Updated from 1st post to 4th post.
    Instructions, Change logs, Downloads, Bugs, FAQ, Troubleshoot, Settings explained, default settings (replace recommended settings)

    20 September 2013
    This time, we are on XDA Developer TV!
    A very nice quick review right here by Jimmy McGee's Android App Review.
    http://www.xda-developers.com/andro...-deserve-with-viper4android-xda-developer-tv/

    4 September 2013
    We finally made our way to the XDA-Developers Portal!!
    Hoooray!! Million thanks to the news writer. ;)
    http://www.xda-developers.com/android/tweak-your-mobile-audio-with-viper4android-audio-effects/

    Official Website
    ViPER's Audio Official Website: http://www.vipersaudio.com/blog
    ViPER's Audio Official Chinese Forum: http://forum.vipersaudio.com/

    Social
    Like our Facebook Page here! >>> https://www.facebook.com/vipersaudio
    Join ViPER's Audio Facebook Group here! >>> https://facebook.com/groups/vipersaudio.en/
    ViPER's Audio Global QQ Group: http://forum.xda-developers.com/showpost.php?p=44506830&postcount=4586

    UNOFFICIAL V4A available in Google Play Store. (Not maintained by us)
    http://forum.xda-developers.com/showpost.php?p=45217407&postcount=5689

    OP Index:
    1. About Us // Description // Key Features // Development Progress // Donations // Open source
    2. Instructions // CPU Driver List // Change Logs // Downloads
    3. Bug list // Proper Bug report // Troubleshooting // FAQs
    4. V4A Profiles // Popular effect simulation profiles // FX and XHiFi Settings Explained // Default V4A settings
    5. For ROM makers
    6. Signatures // Userbar // Banners

    va-official3.png

    About ViPER's Audio
    See here: http://vipersaudio.com/blog/?page_id=11

    Software Descriptions
    Version: FX version 2.5.0.5 (active) / XHiFi version 2.1.0.2-1 (discontinued)
    Codename: (FX version) Beautiful / (XHiFi version) X-Factor
    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
    CPU platforms: ARM (ARM CortexA8 or higher), x86(Atom/i3/i5/i7)
    Language: English (US) / Simplified Chinese / Traditional Chinese / more

    ViPER4Android FX
    FX is the main control panel of ViPER’s Audio with all popular ViPER’s Audio settings.

    ViPER4Android XHiFi (Stopped)
    XHiFi has less settings compare to FX. It has superior audio reconstruction which mainly used for restoring lossy audio quality.

    FX Key Features
    ★ NEW: FET Compressor ★
    New compressor / limiter simulating operation of FET circuits.

    ★ NEW: Quad-Channel Convolver ★
    IRS support extends to 4-channels. *Requires special IRS files*

    ★ AnalogX ★
    Richer and warmer sound by simulating the sound signature of pure class A amplifier. *v2.4.x and above+*

    ★ ViPER-DDC (Now Cuztomizable!) ★
    Enjoy near HIFI sound on your headphones. *Not all models supported*

    ★ Spectrum Extension ★
    Make your music sound lossless with enhanced high frequencies.

    ★ x86 Platform Support ★
    Viper4Android supports x86 (Atom/Core i3/i5/i7) platforms.

    ★ USB/Dock effect Support ★
    ViPER4Android supports USB/Dock audio output.

    ★ Speaker Optimization ★
    First effect for speakers. Try it yourself.

    ★ Channel Pan ★
    Controls left/right channel output. Its not very useful unless your headphone is imbalance or faulty one side. It will be a cure for you.

    ★ Differential Surround / Haas Effect ★
    This is an old feature which ViPER520 had removed from FX in early days.
    But after many users requesting it, ViPER520 bring it back to FX
    More info on Haas Effect: http://www.mixcoach.com/creating-depth-the-haas-effect-2/


    ★ ViPER Fidelity Control ★
    ★ ViPER Bass ★
    With different bass modes, you can have greater bass experience than before!
    ★ ViPER Clarity ★
    With the latest Clarity mode selection, you can balance up heavy bass with high clarity audio that you can never imagine before!

    ★ Headphone Surround+ (VHS+) ★
    With this VHS+, V4A made its way to achieve great surround technologies for Android.

    ★ Auditory System Protection (Cure Tech+) ★
    With normal audio system, listening for more than three hours will feel fatigue, dizzy, tinnitus, irritated and other symptoms.
    This is a normal reaction, heavy bass and high volume could cause permanent damage to the human auditory system, but other phenomena can restore through resting.
    Viper as a listening experience professional will not ignore this problem. Therefore put a lot of effort to study how to make a "Healing" sound technology, just a small success. But thinking on how to let users experience it.


    ★ Convolver ★
    When an Impulse Response Sample(IRS) is loaded, V4A will process the sound to show the same characteristics of the loaded sample. Through Convolution, samples with effects such as equalizer, surround, reverberation, tube etc can be loaded.
    Download and extract IRS files to <storage>/ViPER4Android/Kernel/<paste files here>


    ★ FX Compatible Mode (Only in 4.x) ★
    Compatible Mode supports large variety of music players and the players' own EQ/sound effects (system-provided/third party)
    Therefore, you don't have to select V4A in Sound Settings > Music Effects, choose anything other than V4A. Just run V4A app and the effects will be working with anything else.

    1. In option, switch to Compatible Mode. Reboot, done.
    2. In Sound Settings > Music Effects, choose other than V4A.
    3. Run V4A app and configure the settings then the effects will work together with the one you chose in Sound Settings.​

    ----------------------------------------------
    Last Update Log
    Note: FX v2.3.2.5 onwards:
    1. Fully support x86 platform, but not fully optimised yet. (Using VHS+/Convolver may increase battery usage)
    2. Fully support true octa-core devices.
    3. Correctly-installed Busybox is required before installing V4A.

    If you see V4A installation pop-up loop, its probably due to incomplete root OR htc_audio_effects.conf

    FX version: v2.5.0.5 (New package name! Please uninstall any previous version)
    Android 7.0 Nougat users >>>> Try this fix apk: here.
    !! Detailed update info >>> Read Joe's post: here.
    0. Emergency fix v2504 - repair load file incompatibility issues.
    1. New UI.
    2.Add quad-ch convolver support (stereo convolver).
    3.Add FET compressor.
    4.Support change storage path.
    5.Fix bugs.
    ----------------------------------
    XHiFi version: Final v2.1.0.2-1 (discontinued)
    1.Support for Android 4.3 (v2102-1)
    2.No changes for Android 2.3 (2102)​

    Downloads
    Full download list at Official Website: http://vipersaudio.com/blog/?page_id=48
    Note: Please connect to the internet when installing V4A. So we can count our users.
    ViPER4Android FX
    v2.5.0.5 (Android 4.0~7.0): Mediafire *ZIP Contains v2505 standard & v2505 nougat IO fix apk*
    v2.4.0.1 (Android 4.0~6.0): Mediafire *Does't support below Android 4.0*
    v2.3.4.0 (Android 2.3~5.0): Mediafire

    ViPERsToolBox(For making custom DDC))
    v2.0: Mediafire
    v0.1: Dropbox (Joe)

    ViPER4Android XHiFi
    XHiFi version Final v2.1.0.2-1 (Android 2.3~4.3): Mediafire

    IRS Impulse Response Sample
    Official Website: http://vipersaudio.com/blog/?page_id=91

    XDA:
    IRS Index: here
    Zhuhang's IRS XDA: here
    Joe0Bloggs Headset Correction Filter IRS: here

    Donations
    V4A Project Donation account not available yet.
    Visit here: http://vipersaudio.com/blog/?page_id=180

    Open Source at GitHub

    ------------------------------------------
    ViPER's Audio founded by ViPER520.
    Co-founded by ZhuHang.
    CN. vipersaudio.com / EN. facebook.com/vipersaudio
    Copyright (C) 2006-2017 vipercn.com / vipersaudio.com
    1116
    Installation / Downloads

    Check this post for complete tips, instructions, notes and warnings.

    v2.2.x to v2.3.x Special Update Instructions
    Important: New v2.3.x V4A has new package name, therefore follow this installation steps carefully.
    1. Open old v2.2.x V4A, save the effect profile.
    2. Uninstall old v2.2.x V4A. Complete uninstall, including both driver and app. Reboot.
    3. Install new v2.3.x V4A, choose Yes to "Install/Update". (V4A auto detects and installs correct driver.)
    4. Reboot, open new v2.3.x V4A and load effect profile saved in step 1.​

    Setup your Device
    For Samsung devices,
    1. Try install V4A as user app instead of system app if the latter failed doesn't work.
    2. Use Normal Mode and select V4A FX in Settings>Sound>Music Effects.
    3. If don't work, use another player rather than Samsung stock Music.
    ------------
    1. ROOT your device.
    2. Install busybox if doesn’t come with root.
    3. Modify build.prop (Thanks [email protected])
    a. Open up /system/build.prop in text editor using any file explorer with root access.
    b. Change the line (If you can’t find these lines, skip this step.)

    Ipa.decode=true to lpa.decode=false
    tunnel.decode=true to tunnel.decode=false
    lpa.use-stagefright=true to lpa.use-stagefright=false

    Installation
    1. Download, extract and copy ViPER4Android_FX/XHiFi.apk to your device.
    2. Install the apk as USER app or SYSTEM app is up to you. (v2.3.1.0 onwards)
    3. Run FX/XHiFi app from app drawer, allow root access if asked.
    4. When driver installation prompted, choose Yes.
    5. V4A auto detects your CPU and show available driver modes below :
    No modes: For processors with or without VFP .
    Battery Saving: Available for all processors with NEON.
    High Quality Mode: Available for processors with NEON.
    Super Audio Quality: Available for processors with NEON.
    6. Choose your desired selection.
    7. After installation done, Reboot device.
    8. If you want to use only V4A as audio effect, follow normal mode. If you want existing audio effects to work, follow compatible mode.
    Normal Mode:
    9. In Sound settings > Music effects, always choose V4A FX unless FX is not installed.
    10. Open up V4A FX (and xhifi), in menu, FX Compatible Mode set to Normal Mode.
    11. If not working, try Compatible mode before trying Force-Enable.
    Compatible Mode:
    9. Do not change anything under Sound settings/
    10. Open up V4A FX (and xhifi), in menu, FX Compatible Mode set to Compatible Mode.
    11. If not working, use Normal mode and disable other effects.​
    12. How to use IRS in Convolver? See IRS page: here.

    Future Updates
    Option 1: Use the “Check for update” function in V4A app itself.
    1. In V4A app, go to menu and select Check Update. It will redirect you to a page.
    2. Download latest apk from the page.
    3. Install apk and overwrite. (Replace in system/app/ if its SYSTEM app)
    4. Open up FX (and XHIFI), Choose “Yes”. Reboot, done.


    Option 2: Download from Website/XDA
    1. Download latest FX and XHIFI apks from Website’s Downloads section or XDA.
    2. Install apk and overwrite. (Replace in system/app/ if its SYSTEM app)
    3. Open up FX (and XHIFI), Choose “Yes”. Reboot, done.


    Uninstallation
    1. Open up V4A FX (and xhifi), go to menu and choose “Uninstall driver”.
    2. After that, uninstall V4A FX (and xhifi) app itself.
    3. Reboot. Done. Bye-bye V4A.


    -----------------------------
    ViPER's Audio founded by ViPER520.
    Co-founded by ZhuHang.
    CN. vipersaudio.com / EN. facebook.com/vipersaudio
    Copyright (C) 2006-2016 vipercn.com / vipersaudio.com
    637
    Troubleshoot / Bugs / F.A.Q

    Check previous post for complete tips, instructions, notes and warnings.

    Bug Report
    http://vipersaudio.com/blog/?page_id=120

    Troubleshooting (Updated 20/10/2013)
    Make sure your device is rooted and install latest SuperSU or SuperUser.
    Make sure you install correct apk for your android version.

    1. Complete Uninstall V4A (driver + app) and reboot.
    2. Install V4A as USER app, begin with battery saving mode.
    3. Use Normal mode, go to Sound settings>Music effects> and choose V4A(either fx or xhifi).
    >>>Test.
    4. If not working, switch to Compatible mode, go to sound settings>music effects> and select something else besides V4A.
    >>>Test again.
    5. If not working, return to Normal mode, change sound settings, enable Force-Enable.
    >>>Test again.
    6. If not working, repeat step 1 to step 5 but as SYSTEM app.
    >>>Test again.
    7. If nothing works. Disable or remove the default sound effect under MusicFX, then return to Normal Mode.
    >>>Last Test.
    8. If no help, submit a bug report.​

    F.A.Q
    Updated on October 22, 2013
    HOT: Why some settings are missing?
    A: Because you didn't read update log.

    HOT: Why cannot switch driver mode? (battery saving or high quality)
    A: Only CPU with NEON have choices. To change, uninstall and reinstall.

    HOT: Why no effect?
    A: See Troubleshoot.

    1. Which to install? FX or XHiFi or Both?
    A: The difference is explained in V4A main page. Install FX first. XHiFi is optional.

    2. Where is the build.prop lines in instructions?
    A: This step is optional. Those lines are not in every device. You can skip this.

    3. Can I still install V4A if I already using other sound mods?
    A: Yes, after installation, open V4A app and switch to Compatible Mode.

    4. Why installation fail?
    A: Root or SU binary issues. Use latest SuperSU.

    5. Why is superuser not supported?
    A: V4A does support superuser. Some superuser version have bugs, please use a stable version of it.

    See more:
    6. Why music lag after display off?
    A: This is due to CPU speed too low when screen if off. Make sure you are not using some battery saving CPU governor.
    Switch CPU governor to ondemand/interactive to increase CPU speed or increase minimum clock speed.

    7. Where is minimal phase equalizer?
    A: FIR Equalizer is the name of our EQ, minimal phase is a type of EQ. Its activated for High Quality Mode and Super Audio Quality drivers.

    8. Why does the effect keeps on skipping/cutting (on off on off spontaneously)?
    A: Submit bug report.

    9. Why no effect on Third-party players such as Poweramp and TTPOD?
    A: Disable their own sound effects.

    10. Why no effect in MIUI player?
    A: Try turn off MIUI default equalizer.

    11. Im using Meizu, Flyme system, why effect gone after i display lyrics?
    A: Flyme modified Android's Audio principle, so lyrics will be treated as music effect by the music player, so V4A cant be used.

    12. V4A FX/XHiFi effects suddenly disappeared?
    A: Android system kills certain processes due to memory limits. Install V4A app as system app (Put in /system/app/ and restart)

    13. Why there is background noise when using V4A effects?
    A: This is Android's MusicFX bug, this will happen on all other sound mods.
    Suggestion: Backup and Delete /system/lib/soundfx/libbundlewrapper.so

    14. Why bass reduced in v2.3.x?
    A: Due to sound improvement, audio effects are more precise than before. Therefore, re-adjust your settings.

    15. Why is volume reduced in v2.3.x?
    A: Volume controlled to reduce noise level. (THIS does not mean you can reduce noise by lowering volume xD)

    16. Why is there more CPU/Battery load in v2.3.x?
    A: Quality improved for NEON devices. For now you cannot change to battery saving priority.

    17. Why ViPER4Android FX/XHiFi always FC?
    A: Uninstall and Reinstall V4A. If not submit bug.

    18. Why ViPER4Android FX/XHiFi creates unexpected effects and different from other users?
    A: Use Normal Mode and disable other sound mods such as Noozxoide. If not, reinstall.

    19. ViPER4Android FX/XHiFi doesnt run after reboot?
    A: Check anti-virus or any startup manager whether V4A is disabled on startup.

    20. V4A FX/XHiFi effect gone after using data-killer?
    A: Please add ViPER4Android FX/XHiFi to data-killer whitelist or exception.

    21. V4A XHiFi effects gone after reaching certain volume? (~70%)
    A: This is due to Sony Xperia hearing protection library.
    Suggestion: Backup and Delete /system/lib/soundfx/libhearingprotection.so

    22. Why volume reduces after 10 seconds?
    A: This is not caused by V4A. Most probably you installed a bad and faulty xLOUD, ClearPhase or S-Force Front Surround port.

    23. In-call volume reduced?
    A: V4A will not affect call volume.

    24. What if my phone/tablet cannot detect headset plugin?
    A: Use lock effect mode and choose headset.

    25. V4A effects will spoil internal speaker/headset?
    A: Firstly, there's an audiophile limit in your phone, even if you max every single settings in V4A, u will never achive that limit.
    If the limit is achieved, your ears will blown off before the headset.
    If your earphone is not used to high volume/bass, with long period of high volume/bass will cause your headset to spoil (without V4A it will also spoil)
    For speaker, if a new phone straight away max the volume, within few days there will be distortion. Start off with 50~70% volume and after some time only max the volume.

    -----------------------------
    ViPER's Audio founded by ViPER520.
    Co-founded by ZhuHang.
    CN. vipersaudio.com / EN. facebook.com/vipersaudio
    Copyright (C) 2006-2016 vipercn.com / vipersaudio.com
    554
    FX & XHiFi Settings Explained & Default Settings

    V4A Profiles
    http://forum.xda-developers.com/showpost.php?p=44577409&postcount=4642

    Popular Effect Simulation Profiles (Updated 1/10/2013)
    These setup will sound almost the same compare to original effect.
    1. Dolby System 2.0 (DS2.0) (FX v2.3.0.1)
    - AGC, slight, 4x, 0db
    - VHS+, level 3
    - field surround, strength level 7, mid level 5
    - viperclarity, xhifi mode, default​

    V4A Settings Explained
    http://vipersaudio.com/blog/?page_id=43

    -----------------------------
    ViPER's Audio founded by ViPER520.
    Co-founded by ZhuHang.
    CN. vipersaudio.com / EN. facebook.com/vipersaudio
    Copyright (C) 2006-2016 vipercn.com / vipersaudio.com
    422
    For ROM Makers

    V4A Rom Inclusion
    Website(Down): http://vipersaudio.com/blog/?page_id=127


    Things you need to do
    1. Proper credits to ViPER520.
    2. Add a link to ViPER’s Audio Website. (Its obvious because users need so many info here)
    3. Please remind users to use “Compatible Mode” if you inserted other sound mods.
    4. [OPTIONAL] Attach latest IRS Starter Pack as add-on/optional material for users to start with.


    Extra Tips
    1. Make it a system app.
    2. Copy assets/libv4a_fx/xhifi_xxx.so to /system/lib/soundfx/
    Note: xxx can be gb for 2.3.x, ics for 4.0~4.2 or jb for 4.3
    3. For android 2.3, done. For android 4.x, continue step 4.
    4. Make modification in audio_effect.conf
    (1). Under “libraries {“, add:
    Code:
     v4a_fx {
              path /system/lib/soundfx/libv4a_fx_xxx.so
            }
    #NECESSARY FOR XHIFI
            v4a_xhifi {
              path /system/lib/soundfx/libv4a_xhifi_xxx.so
            }

    (2). Under “effects {“ add:
    Code:
            v4a_standard_fx {
              library v4a_fx
              uuid 41d3c987-e6cf-11e3-a88a-11aba5d5c51b
            }
    #NECESSARY FOR XHIFI
            v4a_standard_xhifi {
              library v4a_xhifi
              uuid d92c3a90-3e26-11e2-a25f-0800200c9a66
            }

    Thanks for promoting ViPER4Android!
    -----------------------------
    ViPER's Audio founded by ViPER520.
    Co-founded by ZhuHang.
    CN. vipersaudio.com / EN. facebook.com/vipersaudio
    Copyright (C) 2006-2016 vipercn.com / vipersaudio.com