Yamaha DX21 - Manual (Page 31)

at the top right corner of the LCD: for example, “OP 3”. This only applies to pa-
rameters which can be individually programmed for each operator, however, when
parameters that affect all operators simultaneously are called (the LFO WAVE,
SPEED and DELAY parameters, for example) the current operator display will di-
sappear from the LCD and individual operators cannot be selected.
A1-A4: OPERATORlAMS ON-OFFIEG COPY, 1—4
Individually turns operators 1 through 4 ON or OFF. In many cases a voice will
not require all operators in an algorithm. Operators that are not needed should
be turned OFF while editing. Also, during the voice creation process, it is a good
idea to start with all operators OFF and then turn them ON one at a time as you
program and add them to the algorithm. The four digits immediately following the
algorithm number on the upper display line represent the four operators, 1 through
4, in order from left to right. When an operator is ON a “1” appears in the corre-
sponding position, and when an operator is OFF a “0” appears in the corresponding
position. Each press on the A1 through A4 buttons alternately turns the corre-
sponding operator ON and OFF.
When the AMPLITUDE MODULATION SENSITIVITY parameter is selected (A14),
these switches are used to determine to which operators the sensitivity setting
will apply.
When the EG COPY function is in use these switches are used to select the operator
to which the data from the currently selected operator will be copied. The parameters
which can be copied are those of ENVELOPE GENERATOR and KEYBOARD
SCALING.
A5: ALGORITHM
Permits selection of any of the 8 available algorithms. The desired algorithm number
is selected using either the DATA ENTRY control or switches.
A6: FEEDBACK
Feedback can be applied to one operator in each algorithm. Pressing this switch
permits setting the amount (level) of feedback which will be applied.
The feedback level range is from 0 to 7. At 0 feedback is OFF, and at 7 maximum
feedback is applied.
Data is entered via the DATA ENTRY control or switches.
A7: LFO WAVE
Permits selection of the low frequency oscillator waveform. The available waveforms
are SAW UP (a rising sawtooth waveform), SQUARE, TRIANGLE, and S/HOLD
(sample and hold).
These waveforms are selected using the DATA ENTRY control or switches.
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