Genelec 9320A

9320 Reference Controller Operating Manual 44 (52)
10 Function Reference
This section present details on the functions available in 9320A.
10.1 MONO
MONO is a mono signal produced by SUM = 0.5 (L+R) inserted into L and R channels. Note that the
sum signal is attenuated by 6 dB, preventing significant subjective level change, and clipping when the
MONO is used.
The MONO signal is attenuated by 3 dB.
Pressing the MONO key reproduces the sum on the left and right channel. MONO amplifies the
correlated content, the content that is the same in the left and right channels, and this is useful for
checking the level and content that is the same in left and right channels.
The MONO key is also very handy for understanding the location of the centre image. Pressing the
MONO key produces a signal that should appear in the midpoint between the left and right monitors.
This helps the listener quickly find the optimal listening position by moving slightly to the left or right such
that the mono image is located at the correct middle location. Moving to this location ensures that the
stereo stage has the correct left-right structure for monitoring.
10.2 DIFF
DIFF is a mono signal produced by subtracting the right channel content from the left channel content,
DIFF = 0.5 (L-R), and inserting the difference signal into the L and R channels.
The DIFF signal is attenuated by 3 dB.
Pressing the DIFF key enables quick listening of the uncorrelated content in the stereo recording.
Frequently the uncorrelated content is related to the acoustical ambience and background sound, such
as audience sound and applauds.
The DIFF key reduces the level when the left and right channel content is correlated, while DIFF
amplifies the level for the content that is out of phase in the left and right channels. Therefore, the DIFF
key is an effective method for understanding the level of the out-of-phase content in the stereo signal.
The DIFF function can also make certain quality problems in recording more audible as is attenuates the
content that is the same in the left and right channels.
10.3 INVERT
INVERT is a stereo signal (L, -R), and if there is content in the centre of the original stereo input, this
becomes small, close to zero, and the differences in stereo are amplified.
The common content in the stereo signal moves to undefined directions when the INVERT is engaged
while the uncorrelated content may become more apparent in the centre of the sound stage. This can
help understanding the structure of the stereo recording.
10.4 MUTE
MUTE key silences all outputs. Then, the MUTE text has red colour. Pressing the MUTE key again un-
mutes all the outputs. MUTE state is also visible in GLM software.