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I've set up a spare bedroom for recording electric guitar. I'm playing thru a Hughes and Kettner Switchblade 100W combo. I'm using a 3 mic technique. The first is a dynamic SM-57 placed about an inch from the grill cloth, midway between the center cone and the outer edge, pointing straight to the speaker. The second is a ribbon mic (Fathead Ribbon) that no matter where I put it (1"-6" away from the grill cloth), I'm getting phasing. I've also got a condenser mic about 5-6' back to pick up the room sound. When I click the phase switch in my sequencer (Sonar) on one of the 2 close mic channels, the sound thickens up nicely and seems to be acceptable. Is it normal to have to use a phase switch like this? In an ideal world, wouldn't it be better to not have to do that? Any advice would be appreciated.

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mark02131 Tue, 07/17/2007 - 12:08

You will always be out of phase at a specific frequency based on the distance between the two mic's. at some frequency the wave length with exactly match that distance and at that frequency you will be out of phase. There is nothing wrong with using the phase switch but I think trying different mic placement may be a better choice unless you like the sound you are getting, then just use the phase switch and go with it.

Link555 Tue, 07/17/2007 - 13:07

Google the 3 to 1 rule for mic placement.

Also keep in mind the phase switch usally just provides a 180 degree phase change, if your phasing is not perfectly out of phase at all frequenicies (can never happen) your will still have issues. The 3 to 1 rule helps reduce phase issue by shear distance.