Now you've got drums you'll need to learn to tune them!
The relationships between the batter head and resonant head provide a sound character suitable for your intended use; and that the relationships between individual drums and the overall drumset provide a logical and pleasant sounding combination.
When tuning a drum, know that the top (batter) head controls attack and ring, while the bottom head controls resonance, sustain, overtones, and timbre.
The resonant head can have a small (approx 6") offset hole to allow for air pressure escape and for the insertion of a microphone;
Some drummers use some kind of treatment inside the drum (such as a pillow, towel, etc.) or one of the many head variations and appliqués to control overtones, this could be that a drummer fills up his kick drum with materials to absorb the sound, or that the batter head has a ring of foam on it or perhaps a kick pad placed on the batter head.