the same group twice to separate tracks and pan them apart for a great stereo sound . Omnidirectional mics are a frequent choice for room mics and , if the room sounds fantastic , some engineers prefer to use a lot of omni mics in close proximity to the sources where other mics might be a typical choice .
2 . Cardioid . A cardioid polar pattern is heartshaped . It captures sound best from the front of the mic but rejects sounds from the back of the mic . Polar patterns are represented by a 360-degree circle , with zero degrees being the front to the mic and 180 degrees the back of the mic . A cardioid mic favors the front of the mic and is said to have 180-degree offaxis discrimination because there is an area of decreased sensitivity 180 degrees behind the front of the mic . Cardioid mics are useful because they can be aimed at the source but also because they can be aimed away from a source that needs to be minimized during tracking .
3 . Bidirectional . A bidirectional microphone captures sound equally at the front and back ( zero and 180 degrees ); however , there ’ s an effective null at the sides of the mic ( 90 and 270 degrees ). Use a bidirectional mic to record two singers at once , placing one singer at zero degrees and the other singer at 180 degrees . It is especially useful that sound arriving at the sides of the mic is rejected very effectively .
4 . Hypercardioid . A microphone with a hypercardioid polar response exhibits a high degree of directionality at the front , with a decrease of about 12 dB on the sides and an area of least sensitivity at about 110 degrees off-axis .
STEREO MIC TECHNIQUES
OVERVIEW : A single microphone can be very effective at capturing a great sound , especially in a close-miking application . However , humans use a two-ear design to listen to sound so there are advantages to using two microphones to