Today we did some stereo mic’ing on the Tone-Kings lead vocals, this type of recording helps bring body to the vocal sound when mixing. the mic’s used on this session was the Neumamm M49, in cardiod pattern with the AKG C12VR underneath the Neumann on the bi-direction pattern. We also added a RCA 77DX ribbon mic for the natural reverb room sound. To help explain this style of this microphone placement is a short article by Buzz Turner.
M/S recording shares the attributes of coincident technique with two important advantages for studio sound; 100% mono compatibility and the ability to alter the sound field in production. Mid Side technique employs two microphones aimed directly at the sound source. The Mid mic can be of any pattern, but is most often of a cardioid or hyper cardioid design. The Side mic is a bi-directional or figure eight pattern. What gives M/S stereo its flexibility and mono compatibility is the sum and difference matrix. The M/S matrix takes the sum information M + S, and sends it to the left channel, and the difference information M - S, and sends it to the right channel. When the left and right signals are combined, (M + S) + (M - S) = 2M, the sum is M information only. If the M/S signals are recorded discreetly (without going through the matrix) the signals can be matrixed in post, and the relative gain of the two signals can be adjusted to provide varying degrees of stereo width. When stereo recording techniques are used in large reverberant spaces, mono summing often results in objectionable amounts of “room sound” versus program material. When MS recordings are summed, Side information (most of the reverberant signal) is completely canceled, not added. M/S recording, compared with other stereo recording techniques, provides the best method for recording.