Equalization means dealing with the frequencies of your instruments and percussion. Hertz (Hz) is the measure of the pitch, also known as the frequency; dB is the volume. Equalization helps you shape the sonic landscape when your music is played back on headphones, speakers, loud speakers, or any type of media device, or even when it is streamed online. You have probably seen the basic controls on entertainment systems and within your automobile radio. The basic controls are simply low, mid, and high. There is a fine line between knowing what to adjust and what sounds good just the way it is! The best advice is to trust your ears and get feedback from others in order to recognize the techniques that work for you. A pitch-to-frequency chart will help you understand the exact frequencies that correlate to the pitches, as shown in the following screenshot:

Fig 6.13