Yamaha SPX900 Operation Manual - The Front Panel
1: CONTROLS AND CONNECTIONS
THE FRONT PANEL
Power ON/OFF Switch
Press to turn power ON, press
again
to turn power OFF.
When the power is turned ON, the last program and
parameter selected will be automatically recalled.
Input Level Control
This control varies the input level of the input from
approximately -90 dB to +10 dB when the rear-panel
input level switch is set to +4 dB. and between
approximately -110 dB and -14 dB when the input level
switch is set to -20 dB.
PARAM Key
Accesses the main effect parameters for each program.
Each time the PARAM key is pressed the next parameter
in the selected program’s “parameter set” is called. It is
also possible to scroll backward through the parameter set
by using the SCROLL BACK key (7). Once the desired
parameter has been selected its value or setting can be
changed using the parameter and keys (9). The
PARAM key is also used for cursor control (forward
cursor movement) in some utility functions.
Details under “THE PROGRAMS & PARAMETERS”
starting on page 9
LEVEL Key
Accesses the output level and balance parameters for
each program. Once the LEVEL key has been pressed,
both the LEVEL key and SCROLL BACK (7) key can be
used to select parameters. Once the desired parameter has
been selected its value or setting can be changed using
the parameter and keys (9).
Details on page 9
EQ Key
Accesses the digital equalizer or dynamic filter
parameters for each program. Once the EQ key has been
pressed, both the EQ key and SCROLL BACK (7) key
can be used to select parameters. Once the desired
parameter has been selected its value or setting can be
changed using the parameter and keys (9).
Details on page 9
INT PARAM Key
Accesses a special set of internal parameters for each
effect program. Once the INT PARAM key has been
pressed, both the INT PARAM key and SCROLL BACK
(7) key can be used to select parameters. Once the desired
parameter has been selected its value or setting can be
changed using the parameter and keys (9).
Details under “THE PROGRAMS & PARAMETERS”
starting on page 9
SCROLL BACK Key
When any set of parameters is selected – PARAM,
LEVEL, EQ, or INT PARAM – the SCROLL BACK
key can be used to scroll backward through the available
parameters while the PARAM (3), LEVEL (4), EQ (5) or
INT PARAMETER (6) key scrolls forward. according to
the parameter set selected. The preceding parameter in
the current set is selected each time the SCROLL BACK
key is pressed. The SCROLL BACK key is also used for
cursor control (backward cursor movement) in some
utility functions.
EXT CTRL ASSIGN Key
This key makes it possible to assign any parameters
(PARAM, LEVEL, EQ or INT PARAM) to external
controllers connected to the front-panel EXT CTRL/
FOOT VOL 1 and 2 jacks (19). These controllers can
then be used to control the assigned parameter in real
time. Yamaha FC7 Foot Controllers are recommended.
Details on page 8
Parameter and Keys
These keys are used to change parameter values when
parameters are selected for editing (after the PARAM,
LEVEL, EQ or INT PARAM key has been pressed). The
parameter and keys are also used to program several
UTILITY functions. The and keys can be pressed
briefly to change values in single steps, or held down for
rapid continuous incrementing or decrementing of the
selected value. While holding down either the or
key. pressing the other key ( or ) causes the
incrementing or decrementing process to be carried out
more rapidly.
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