"Florence, Italy - August 19, 2012:  An hand holding the Galaxy Nexus smartphone on white background showing the homescreen with the Google applications. Made by Google and Samsung it mounts the operating system Android 4.1 (called Jelly Bean)."
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Why You Probably Need To Change Your Android Phone's Equalizer Settings
To get the perfect sonic experience from your phone, you need to understand its equalizer (EQ), and the EQ situation on Androids isn’t universal. Most Android phones have an EQ dashboard that operates at the system level, but audiophiles with dedicated headphones can use an EQ designed for those headphones, and finally, there are third-party apps.
Android smartphones have an equalizer so you can tweak the sound waves that enter your ears; whether you want to tone down the bass or mellow the vocals with higher treble, an equalizer is where all of that customization is handled. The equalizer alters the frequencies representing the qualities you commonly know as bass, treble, and mids.
A good way to ease into understanding EQ basics is through an app, which offers a dedicated Equalizer section where you can choose between preset profiles such as country, electronic, metal, hip hop, etc. The intensity of frequencies has been separately tuned for each profile by audio engineers, making them extremely user-friendly, especially for beginners.
If you want more control than a third-party app allows, locate the Equalizer on your phone in the Sound & Vibration section of Settings. Once you navigate to the Equalizer, you should find a page featuring vertical sliders, each representing a frequency; the one on the left is the lowest frequency, while the bar furthest to the right is the peak frequency.
Once you get the hang of equalizer settings, explore cutting and boosting. Cutting refers to reducing the intensity of a frequency, which means you want to hear less of the sound, and boosting is enhancing sound. Cutting is the way to go when you're new to equalizer tuning because boosting too many frequencies can muddy the final sound.