Yamaha CS1D Owner's Manual - Page 546

COMPANDER (HARD & SOFT), This sets the cutoff fre

Page 546 highlights

Appendices RATIO-This determines the amount of expansion. That is, the change in output signal level relative to change in input signal level. For a 2:1 ratio, for example, a 5 dB change in input level (below the threshold) results in a 10 dB change in output level. For a 5:1 ratio, a 2 dB change in input level (below the threshold) results in a 10 dB change in output level. INPUT FILTER HPF/LPF-Select the filter that will be applied to the signal immediately before the expander. When HPF (high pass filter) is on, the expander will apply to the signal that has passed through the HPF, and the signal that has passed through the LPF will then be mixed in. For COMP ON and HPF ON LPF + HPF EXPANDER SELF POST EQ When LPF (low pass filter) is on, the expander will apply to the signal that has passed through the LPF, and the signal that has passed through the HPF will then be mixed in. COMPANDER (HARD & SOFT) The hard (H) and soft (S) companders comprise of compressor, expander, and limiter. The limiter prevents output signals from exceeding 0 dB. The compressor compresses signals that exceed the threshold level. The expander attenuates signals below the threshold and width. The soft compander has an expansion ratio of 1.5:1, while the hard compander has an expansion ratio of 5:1. The following two graphs show typical compander curves. The one on the left shows the hard compander. The one on the right, the soft compander. For COMP ON and LPF ON HPF + LPF EXPANDER SELF POST EQ If you want the signal immediately after passing through the LPF or HPF to be used as the key-in signal for the internal compressor, select SELF POST EQ as the key-in signal. When the key-in signal is set to LEFT CH (when the key-in signal is taken from the previous-numbered channel), and if COMP is turned on and LPF or HPF is also turned on for the channel that is the source of the key-in signal, then the signal after passing through the filter will be output as the keyin signal. INPUT FILTER ON/OFF-This turns the input filter on/ off. If off, the LPF/HPF setting will be ignored. INPUT FILTER FREQUENCY-This sets the cutoff frequency of the LPF/HPF. (The LPF cutoff frequency and HPF cutoff frequency are always linked.) Output Level (dB) Output Level (dB) +20 +10 Width 0 -10 -20 -30 -40 -50 -60 -70 Threshold -70 -60 -50 -40 -30 -20 -10 0 +10 +20 Input Level (dB) Hard Compander +20 +10 Width 0 -10 -20 -30 -40 -50 -60 -70 Threshold -70 -60 -50 -40 -30 -20 -10 0 +10 +20 Input Level (dB) Soft Compander 14

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Appendices
14
RATIO
—This determines the amount of expansion.
That is, the change in output signal level relative to
change in input signal level. For a 2:1 ratio, for example,
a 5 dB change in input level (below the threshold) results
in a 10 dB change in output level. For a 5:1 ratio, a 2 dB
change in input level (below the threshold) results in a
10 dB change in output level.
INPUT FILTER HPF/LPF
—Select the filter that will be
applied to the signal immediately before the expander.
When HPF (high pass filter) is on, the expander will
apply to the signal that has passed through the HPF, and
the signal that has passed through the LPF will then be
mixed in.
When LPF (low pass filter) is on, the expander will apply
to the signal that has passed through the LPF, and the
signal that has passed through the HPF will then be
mixed in.
If you want the signal immediately after passing
through the LPF or HPF to be used as the key-in
signal for the internal compressor, select SELF
POST EQ as the key-in signal.
When the key-in signal is set to LEFT CH (when
the key-in signal is taken from the previous-num-
bered channel), and if COMP is turned on and LPF
or HPF is also turned on for the channel that is the
source of the key-in signal, then the signal after
passing through the filter will be output as the key-
in signal.
INPUT FILTER ON/OFF
—This turns the input filter on/
off. If off, the LPF/HPF setting will be ignored.
INPUT FILTER FREQUENCY
—This sets the cutoff fre-
quency of the LPF/HPF. (The LPF cutoff frequency and
HPF cutoff frequency are always linked.)
COMPANDER (HARD & SOFT)
The hard (H) and soft (S) companders comprise of com-
pressor, expander, and limiter. The limiter prevents out-
put signals from exceeding 0 dB. The compressor
compresses signals that exceed the threshold level. The
expander attenuates signals below the threshold and
width. The soft compander has an expansion ratio of
1.5:1, while the hard compander has an expansion ratio
of 5:1. The following two graphs show typical com-
pander curves. The one on the left shows the hard com-
pander. The one on the right, the soft compander.
For COMP ON and HPF ON
LPF
HPF
EXPANDER
SELF POST EQ
+
For COMP ON and LPF ON
HPF
LPF
SELF POST EQ
+
EXPANDER
–70
–60
–50
–40
–30
–20
–10
0
+10
+20
–70
–60
–50
–40
–30
–20
–10
0
+10
+20
Input Level (dB)
Hard Compander
Output Level (dB)
Threshold
Width
–70
–60
–50
–40
–30
–20
–10
0
+10
+20
–70
–60
–50
–40
–30
–20
–10
0
+10
+20
Input Level (dB)
Soft Compander
Output Level (dB)
Threshold
Width