Another cool technique is Blumlein.
Where two Bi-directional microphone are one above the other with the two microphone capsules as close together as possible. they tend to be placed one on top of the other vertically.
the two capsules are perpendicular to each other (90 degrees) and the sound source is placed in the mid point of the two microphones.
check out some photos on google for an idea of how to set it up
Hi there,
yes, i mentioned those above but have left them out for this section as they are a little more complex in their fields and for the newbie to organise, the set ups mentioned above are more about expanding the horizontal stereo field for instruments in a recording. The Mid-side and Blumline are based on a central axis point capturing a broader polarity range field from a central point. But yep they are both good to use as well. I will cover those in a later lesson when i get into mixing.
cheers.