Yamaha DX21 - Manual (Page 33)

A12: LFO SYNC
The beginning of the LFO cycle is normally synchronized with key-on timing. This
parameter permits turning this synchronization ON or OFF. All operators are affected
simultaneously.
When this parameter is ON, the LFO cycle always begins from the peak of a positive
half-cycle (90 degrees phase angle) when a key is played. This produces a clear,
consistent attack on all notes.
When LFO KEY SYNC is OFF, the LFO cycle starts from a random point when a
key is played. This is the ideal setting when the LFO is being used to create na-
tural-sounding chorus or phasing type effects.
N O T E :
When in DUAL or SPLIT mode, the “B” voice is affected by the LFO data
of the “A” voice.”
A13: PITCH MODULATION SENSITIVITY
This parameter sets the sensitivity of all operators to pitch modulation applied either
via the LFO PMD parameter, above, or via the modulation wheel of breath controller.
The data range is from 0 to 7. At 0 no pitch modulation can be applied, and at 7
the maximum pitch modulation can be achieved. When LFO PMD, above, is set
to 99 a setting of 7 produces a plus and minus one-octave pitch variation.
A14: AMPLITUDE MODULATION SENSITIVITY
This sets the operator’s sensitivity to LFO and EG BIAS effects applied via the LFO
PMD or AMD functions, or via the modulation wheel or breath controller.
The application of LFO modulation to a carrier results in tremolo, and applied to
a modulator the result is a periodic variation in timbre which is similar to wow effects.
When EG BIAS is applied to a carrier via the breath controller the result is volume
(expression) control, and applied to a modulator the result is brilliance control.
The data range is from 0 to 3. At 0 amplitude modulation sensitivity is OFF and
no LFO or EG BIAS effects can be applied to the selected operators. A setting of
3 produces maximum sensitivity and therefore maximum effect depth.
The operators to which modulation sensitivity is to be applied are selected using
buttons A1 through A4. The four digits—1 or 0—at the top right corner of the LCD
correspond to operators 1 through 4. When an operator is turned ON—i.e. able to
receive amplitude modulation—the corresponding digit will be a “1”. When OFF
the corresponding digit will be a “0”. The operators are turned ON and OFF al-
ternately each time the corresponding OPERATOR/AMS ON-OFF/EG COPY button
is pressed.
A15: EC BIAS
This sets the operator’s sensitivity to EG BIAS effects applied via the breath con-
troller. EG bias changes the overall output level from the operator. The harder you
blow into the breath controller, the higher the maximum envelope level. When EG
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