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the MIDI volume messages that are sent to each device when SL-2001 preset is selected.
As in the PROGRAM screen, the top line displays the names of the devices (or ports) controlled by zones one through four.
The bottom line shows the value of the MIDI volume control message that will be issued as the SL-2001 preset is selected.
Use the four control sliders to adjust the initial volume setting for each device (the initial volume message is transmitted as
the slider is changed, which allows the relative volumes of all devices to be easily adjusted by ear). The initial volume para-
meter has a range of zero to 127. If no volume initialization is desired, adjust the control slider until two dashes appear under
the device name. For best signal-to-noise ratio, at least one of the zones should be set to maximum, and the others adjusted
below it to achieve the proper mix.
To select initial volumes for devices assigned to Paths five through eight, press the right arrow switch ( > ); the zone digits
will then display 58. If more than one zone is assigned to the same output device, the initial volume value may only be
entered for the first zone connected to the device; the volume values will be blank under the duplicate names. This prevents
conflicting volume messages from being sent to the same device.
If a zone is bypassed, its output port will be displayed. Volume initialization commands can not be sent from a bypassed
path.
VOLUME CONTROL
Volume control is an essential means of expression in music performance. Each zone (and therefore each sound module)
may be programmed to respond to volume adjustments from a SL-2001 control slider, voltage (pedal) input, or any MIDI con-
PERFORM /
Vol
Ctl
Pol
cv 2
+
csl 1
csl 2
csl 3
troller (e.g., a mod wheel).
Control slider 2 is used to select the source of volume control. Select from any of the four control sliders (in Perform Mode),
control voltage input 1 or 2, Wheel A or B. If no adjustments are required during performance, select None.
Control Slider 2 selects the polarity. Positive (+) polarity means that an increasing controller value (e.g., pressing a voltage
pedal forward) results in an increasing volume. Negative polarity (-) means that an increase in controller value results in a
volume decrease. The polarity function can therefore used to cross-fade between two different sound modules as the source
controller is moved through its range. Set the polarity for one zone to positive, and the polarity another zone to negative to
achieve a cross fade. Since up to eight zones may be active at once, two multi-layer sounds may be cross faded.
The Volume Control function interacts with the settings on the main Volume screen. The volume control source is automat-
ically scaled by the initial volume setting. Moving the source controller (for example, a foot pedal) from zero to maximum
will result in a volume change from zero to the initial value set on the Master Volume screen. This automatic scaling feature
maintains the relative audio mix between all of the sound modules as the volume is changed. The effect is the same as if a
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conventional mechanical volume pedal were used to adjust the volume of an audio mixer output.
By using the SL-2001 instead, the noise and reliability problems of a mechanical volume pedal are eliminated. The diagram
below illustrates the volume control function in a preset using three zones.
Three zones are active in this example. The initial volumes have been programmed on the VOLUME screen to achieve the
desired relative mix. If the source controller (usually a foot pedal connected to cv 1 or 2) is at the top of its range, the three
sound modules will remain at the initial volume levels. As the pedal is moved downward, volume messages are issued to
each of the three sound modules. The relative mix between the sounds is retained, until eventually all volume levels reach
zero. Variations among different sound modules and manufacturers can cause slight volume mistracking as the controller is
moved; initial volumes may have to be adjusted for the best response over the range of interest.
The volume control function is not available if the zone is bypassed, and the parameter values are not displayed.
KEY HOLD
The KEY HOLD function is used to produce the same effect as the Sostenuto pedal on a grand piano.
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127
Zone 1
Zone 2
Zone 3
0
Coontroller
127
PERFORM /
EDIT
Key
Hold
Source
Off
sw A
csl 1
csl 2
csl 3
csl 4
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Zone 1
Zone 2
Zone 3
ZONE
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