Gobos are really useful things especially if you're working in a sub-par recording environment (ie. your living room). So what exactly is a Gobo?
Baffle - A physical object that absorbs or otherwise reduces the volume of sound which passes through it, or is reflected by it.
Gobo - see Baffle.
In other words, It absorbs or blocks sound. Those are the 2 main ways this effect can be achieved:
1. Absorbing the sound (converting it to heat via friction) - this is what foam, cloth, and other porous materials do.
2. Reflecting the sound (bouncing it back where it came from) - this is what concrete, and other non-porous materials do.
Here's a youtube video of the finished product:
Step 1: Gather your materials
note: Each step covers what to do for one gobo. You need to do the instructions from step 3 - 12 twice to complete both gobos.
- 16 feet of 2x12 lumber
- 12 feet of 2x4 lumber
- 2 - 2' x 2' pieces of 1/4" plywood
- 2 - handles (I used cabinet handles)
- Box of 2" wood screws
- Fiberglass insulation
- A cover for the absorptive side of the gobo
Step 2: Gather your Tools
Tools you'll need:
- Circular Saw
- Drill (with a 3/32" bit; A screwdriver bit would also be useful)
- Measuring Tape
- T - Square
Step 3: Cut your pieces
- (2x) 2x2 1/4" plywood
- (2x) 2x2 pegboard
- (4x) 2' long 2x12
- (4x) 1' 9" long 2x12
- (4x) 2' long 2x4
- (4x) 8" long 2x4
Step 4: Mark your 2x12's for drilling
Step 5: Set up a box prototype
Step 6: Drill and screw!
The four pieces should make a perfect square with 90 degree corners. Use the T - Square to check this is the case as you go.
Step 7: Add the reflective side
Step 9: Attach the handle
In this picture, the long 2x4's on either side of the center row (the one with the handle and the shorter 2x4's) represent the positions of the feet of another gobo. Don't attach these long pieces, they're just to help you understand.
Before you attach the handle mark where the holes need to be drilled by putting the handle on it's side. Drill from top to bottom through the marks you just made. Then it's a piece of cake to attach the handle using the screws that come with it (all the handles at Loews came with screws)
Step 10: Cut the Fiberglass
Cut 2 of the 6 segments in half (as pictured).
Step 11: Put the fiberglass in the gobo
Step 12: Attach the absorptive side's cover
One additional option is to skip the fiberglass and use Plexiglas instead of plywood for both sides. This makes a see through gobo, which is useful when you have several gobos and you want to stack them without breaking the musician's eye contact.
note: there is no insulation in the picture. This is just because I'm dumb and took the picture at the wrong time ;). Don't take the fiberglass back out of the box.
Step 13: Attach the feet
Whatever you do, just make sure you put the screws in far enough that they're somewhat inset into the 2x4. You don't want the screw sticking out, or else it'll be wobbly and also scratch wood and tile floors.
Keep in mind that these need to be all the way to the edges, because the handle and alignment 2x4's need to fit in between them.