[Galaxy S II General] EttyN:
This is a tutorial on using audio mods and settings to achieve maximum sound quality from the devices you are using. Any decent pair of headphones or earphones are capable of delivering much higher quality sound than they do using default device settings and equalizers, and you'll be surprised how far a little tweaking will take your whole music experience.

Mods You Will Need

The magic is made possible entirely thanks to ViPER's Audio,http://xdaforums.com/showthread.php?t=2191223, which you will need to install to use the settings described in this thread. Visit the ViPER's Audio page (linked above) and follow their instructions listed in their thread to get ViPER4Android FX installed on your device.

You will also need DSP Manager for a single setting in this tutorial, I've attached the APK for DSP Manager 2.0

The Settings

Once you have ViPER4Android FX and DSP Manager installed, use the following settings to take your music to a whole new level.

ViPER Settings...

MASTER POWER

Enable: This must of course be enabled to switch on the music effects.

PLAYBACK GAIN CONTROL

Enable: Enable PlaybackAGC

Effect Strength: Moderate

Max Gain: 4x

Max Output: -1.9dB

Leave FIREQUALIZER, CONVOLVER, FIELD SURROUND, DIFFERENTIAL SURROUNND, HEADPHONE SURROUND +, and REVERBERATION disabled.

DYNAMIC SYSTEM

Enable: Enable dynamic system.

Select Listening Device: Set to Common Earphone V2

Select Dynamic Bass: Set to 33%

Tube Simulator: Leave tube simulator disabled

FIDELITY CONTROL

Enable Viper Bass: Enable Viper Bass

Select Bass Mode: Set to 40Hz (I've chosen this because it significantly enhances the bass experience in music, by making the bass more "felt" than heard. This makes bass feel more powerful and realistic, but because it requires a decent set of earphones or headphones to actually work properly. By setting the Bass Boost higher for less powerful speakers, it may be possible to achieve the desired bass effect. If bass seems too weak at 40Hz, feel free to set it to 60Hz or even 100Hz as required. Because 40Hz takes real speaker power to pull off, I've noticed that for most earphones it makes bass crisp and powerful without completely overpowering music.)

Select Bass Boost: 10.0dB (for use with a Bass Mode of 40Hz on most headphones and earphones, but may be adjusted as needed on less powerful speakers)

Enable Viper Clarity: Enable Viper Clarity

Select Clarity Mode: Set to XHiFi (I've found that XHiFi enhances the highs and vocals much more effectively than Natural, and really emphasizes sounds that may not even have been heard before)

Select Clarity: Set to default (This ensures that even though highs and vocals are more prominent, they are not overpowering)

AUDITORY SYSTEM PROTECTION

Enable Cure Tech+: This setting is completely optional. Leaving it unchecked ensures that every single detail of music is still heard, while checking it slightly removes very high highs and protects your hearing.

Select Binaural Level: If you do enable Cure Tech+, I'd recommend at least a Moderate setting to truly benefit from the setting. It doesn't have too much of a negative impact, and after getting used to it, music still sounds amazing.

MASTER GATE (LIMITER)

Output gain: 0dB

Channel Pan- 0.5:0.5

Limit Threshold: 0dB

DSP Manager Settings...

The only thing you need to change in DSP Manager is setting

DYNAMIC RANGE COMPRESSION

Enable: Enable Dynamic Range Compression

Select Effect Strength: Extreme

(This brings all elements of the music to an equal volume, which makes music much more detailed and brings out sounds you never heard before, while keeping any bass or vocals from becoming too powerful)

You can double check all of these settings in the images attached.

Remember to hit the Thanks button if your music has never sounded better;)