Equalizer is a cool feature that adjusts base and treble when you're playing a song to give you the best possible audio experience. These adjustments are made as the track is playing, however, so your smartphone has to work harder to deliver on short notice. If you're not an audio snob or you don't need the premium audio experience all the time, turn off EQ.
Tap Settings, then tap Music. Tap EQ, then tap Off so a check mark appears to the right.
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