In recording, a gobo is a device designed to 'go-between' (go-bo) two instruments to help reduce the sound leaking from one instrument into the microphone of another. For instance, the most natural (musical and exciting) way to record a rhythm track is to record rhythm guitar, bass and drums simultaneously. Although digital recording with unlimited tracks has made overdubbing ubiquitous, the 'feel' of a track is often best captured when the musicians are grooving together in the same room.

Recording this 'magical' event can pose a challenge as the drums will surely be heard in both the guitar and bass microphones and you can bet that the drum overheads will probably pick up some of guitar and bass. The challenge comes, not during the recording process, but during the mixing and editing stage. This is when some of the unwanted 'spill' may pose a problem. For instance you may want to mute the rhythm track but it still will be present on the drums.

Gobos are used to isolate the instruments from each other to reduce the spill. And because there are all kinds of instruments and numerous applications where gobos can be used, there are many gobos to choose from. Most studios will have a wide range of gobos in their closet including good heavy packing blankets that can adapt to all kinds of situations. The key here is flexibility. It is also important that you keep a line of sight between musicians. Just seeing the other player helps nail the timing.

Light weight gobos
Gobos like the Primacoustic Freeport range are designed for flexibility. They assemble in minutes and are easy to place in between instruments without taking too much floor space. They are also wonderful for creating more intimate recording spaces for voice-over and very effective when you need to create a temporary mixing position.

Larger heavy gobos
Gobos like the Primacoustic G-Trap and the Mega-block are designed to both control sound and absorb bass. This is particularly important in small rooms where it seems you can never have too much bass absorption! These gobos are designed to be stacked to create walls in between and around instruments

Which gobo is right for me?
There is no right or wrong answer here; with gobos, the more the better! Start with a couple, add more as you go. A gobo can often make all of the difference when recording and once you start using them you will never go back!