Equalizer
A list of ranges with sliders to raise and lower the volume of the frequency range between 32 Hz, 64 Hz, 125 Hz, 250 Hz, 500 Hz, 1 kHz, 2 kHz, 4 kHz, 8 kHz, 16 kHz. Change how everything sounds: sound volume, noises, the effect of moving closer and farther. Remember the settings and apply them to other calls.