[Android Software Development] zhuhang:
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.

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Co-founded by ZhuHang.

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