Access Virus TI, User Manual

Page: 33 / 218

33 FIRST STEPS
FM AMOUNT
FM stands for Frequency Modulation. This means that the fre-
quency of one audio source is modulated by another – the
FM AMOUNT parameter determines how much. As well as
being able to create bell-like tones, FM is often used to add grit
to a sound.
You should always think of the FM signal as being an integral
part of oscillator 2.
Restore ROM-A126 and turn oscillator 1 SHAPE down to 0 for a
pure sine wave. Select OSC2 and turn its SHAPE all the way
down as well. Now find out what the FM AMOUNT knob does to
the sound...
FM MODE
Via SHIFT + FM AMOUNT. Selects one of several different FM
modulator sources. If you feel like experimenting with this
parameter, start by changing the FM mode from Pos Triangle to
Triangle.
UNISON DETUNE
Via SHIFT + DETUNE 2/3. Unison means several instances of
the same note at the same time. For UNISON DETUNE to have
any effect, the number of stacked (layered) voices must of
course be greater than 1. For this we need to go into one of the
EDIT menus...
Restore ROM-A126, press the EDIT button to the left of the dis-
play and use the PARAMETERS buttons find the UNISON page.
Set the Voices parameter to maximum (8) and
Û
EXIT the menu.
Play your keyboard – quite a powerful lead sound already. Now
use SHIFT+DETUNE 2/3 to take UNISON DETUNE up to maxi-
mum.
For much more of a “Hoover” type sound, turn DETUNE 2/3
(without SHIFT this time!) up to around 115, and add some
SUB OSC and NOISE (look in the MIX section). Might as well
activate Oscillator 3 as well for maximum power: Press the
OSC3 ON button...
This type of sound is actually much easier to make using the
new HyperSaw oscillator mode (see the end of this chapter), but
you should learn about the “Classic” oscillator models first.
Now add a simple delay effect by turning delay SEND and
FEEDBACK up a little (you will find both these knobs in the
EFFECTS section). Play your keyboard while tweaking the
CUTOFF knob.