Stereo recording

Time-of-arrival stereo (AB)

(almost) only time-of-arrival differences

Intensity stereo (XY)

only sound pressure level differences

Equivalence or mixed stereo (here: ORTF):

sound pressure level and time-of-arrival differences

Baffle stereo (here: OSS)

sound pressure level, time-of-arrival and spectral differences with off-axis sound

Mid/side (MS)

M-Microphone records the mono signal

S-Microphone (fig-8) records the side signals