Measure your studio from floor to ceiling. That measurement should be the one you use for your baffles. Baffles can be as wide as you want, but the most efficient baffle is 2 feet wide. If your room is 10 feet tall, you'll need two 10-foot pieces for the sides of the baffle, and two 2-foot pieces for the top and bottom. Most hardware stores sell 2-by-6 beams in 10-foot lengths, so you'll need three beams to complete one baffle.
Arrange the four wooden pieces into a rectangle on a flat surface.
Secure the four corners of the rectangle using your power drill and screws. Be sure to use at least two screws per corner; you want your baffle to be sturdy.
Using your stud finder, locate and mark the positions of the studs along your wall. With the marked studs as a guide, attach two 90-degree brackets to the wall. Hang the baffle frame on the wall and secure it with two screws.
Line the inside of your baffle frame with heavy foam or soundproofing insulation. The thicker the foam, the more absorbent it will be.
Stretch the fabric across the front of the frame. Secure it to the sides with your staple gun. You want to be sure that the fabric is tightly stretched so that the sound waves can pass through the material.
Repeat this process to make as many baffles as you need.