Analogue Solutions Nyborg - Manual (Page 12)

VCO 1& 2 - contd
MODULATION SOURCE ROTARY SWITCH
This selects the modulation source for either PWM or FM and is routed to the control
above.
The source options are;
EG1/2
For pitch sweeps. Good for percussion sounds.
EXT A signal patching into the EXT socket s used as a modulation source.
LFO For vibrato and trill effects
VCO2/1 For frequency modulation effects
PULSE WIDTH
This control allows manual shaping of the pulse wave output. It alters the pulse width
(duty cycle) of the pulse wave. In a central position a square wave is produced (approx.
50% duty cycle). Try this control and listen to how the tone of the waveform changes.
When using Pulse Width Modulation, it is best to set the Pulse Width control to centre,
otherwise the sound may cut-out (which can be used for creative effect!)
SYNC
SYNC forces one VCO (the slave VCO) to start a new cycle each time the other does
(the master VCO). This means that the slave VCO can only play the harmonics of the
master. Particularly interesting effects can be made when the pitch of theslaved VCO
is changed, for instance, by sweeping with an EG.
SYNC SWITCH
This switch selects the routings for oscillator sync. The options are:
1>2
VCO2 slaved to VCO1
LFO>2 VCO2 slaved to LFO
OFF Off / no sync effect
2>1 VCO1 slaved to VCO2
Oscillator sync is where the master signal will reset the waveform of the slave signal
each time the master waveform starts a new cycle.
Try the different settings and listen to their effect. You may have to modulate the pitch
of either VCO1 or VCO2 to enhance the effect. There is a balancing act between the
pitch of the two sound sources (usually the 2 VCOs) to get a good effect, once found
you'll know you've found it!