Yamaha AN200 manual 33 , 34

Chapter 9 LFO Modulation
42
33 Modulating the Filter
Now, let’s apply the LFO to the Filter — and create some interesting wah-wah effects.
1 Press [DETAIL] until “Fmd” (Filter Modulation Depth) appears briefly in
the display.
2 Use the [DATA] knob to set the value to around “-34.”
This is the Filter Modulation Depth setting. Setting Filter Depth to -34 gives the LFO some control over
the timbre or tonal quality of the sound.
3 Press [KEYBOARD] to use the keyboard, and hold down one of the keys.
Can you hear the wah-wah sound? Try tweaking the [DATA] knob in the range of -64 to -24 and listen to
the changes in Filter modulation. Also try tweaking the sound at the positive end of the spectrum (16 to
46) as well, and listen for the difference.
For more fun:
Try tweaking the VCF controls. Naturally, if the LFO is being applied to the Fil-
ter, any changes you make to the Filter section will affect the LFO-modulated
sound as well.
34 Modulating the pitch
Try using the LFO to warp the pitch — and discover some more awesome modulation effects.
1 Press [DETAIL] until “Pmd1” (Pitch Modulation Depth 1) appears briefly in
the display.
2 Use the [DATA] knob to set the value to around “0.”
This is Pitch Modulation Depth 1 (for VCO 1). Start out with this minimum value.
3 Press [KEYBOARD] to use the keyboard, and hold down one of the keys.
As the sound sustains, slowly turn the knob counter-clockwise, and bring the value down toward
“-127.” Notice how the pitch becomes less and less distinct the further you get from “0.” (This is true
for positive values as well.) For some Voices, the pitch may stay distinct but change radically — over an
octave or more!
Try experimenting with different LFO Speed settings, and also try holding down more than one note.
If you’ve come to this Tip directly from Tip 32 above, you’re hearing the LFO applied to both
Amplitude and Filter. To hear the Filter effect all alone by itself, set Amplitude back to normal
(0).
Filter Modulation Depth
Determines the Filter modulation depth for
the LFO. A value of “0” results in no Filter
change. Values toward -64 produce a nega-
tive Filter depth; values toward 63 produce a
positive depth. To set, press [DETAIL]
repeatedly (until “Fmd” appears), and use
[DATA] knob.
Range
-64 (maximum negative) — 0 (no change)
— 63 (maximum positive)