ALESIS ANDROMEDA A6 User Manual

Page 112

Chapter 5: Oscillators and Filters

110

NDROMEDA

A6 R

EFERENCE

ANUAL

DISPLAY
PAGE

PANEL LABEL

PARAMETER
DISPLAY

OPTIONS

or RANGE DESCRIPTION

OSC2FM

Continued

—

OSC2FM

0 ··· 100

This soft knob sets the amount of FM for the
type(s) selected in the

ASSIGN

parameter

above. If a combination of two or more types

are assigned, notice that the amounts change
together and by the same amount. Also notice
that this soft knob has the same function as

the

OSC 2 FM

knob in the

OSC 1

section.

Basic Operation
To get started, it’s best if OSC 2 is not heard. You can always mix it in later, but for
now you should turn the

OSC 2

knob in the

PRE FILTER MIX

all the way counter-

clockwise. Also, be sure that

SYNC

is set of off.

Next, press the

VIEW

button for

OSC 1

, then press soft button 4 to select the

OSC2FM

page. Using soft knob

ASSIGN

, select

LINEAR

as the FM type. If

EXPFM

and

PWM

aren't set to

0.00

already, zero them out using soft knobs

and

(or by pressing the

▲

and

▼

buttons simultaneously).

As mentioned earlier, the

OSC 2 FM

knob adjusts the amplitude (amount) of

OSC 2

modulating

OSC 1

. You can also use soft knob

for this purpose, or the individual

soft knobs for each type of FM.

Play a key on the A6’s keyboard. As you vary the amount, you will notice significant
changes to the timbre of the sound.

Next, try experimenting with the frequency of

OSC 2

. First, vary the

SEMITONE

knob

while playing the same key repeatedly and note the difference in timbre. When you
arrive at a setting that sounds desirable, remember that you can fine-tune this
frequency with the

CENTS

and

FINE

knobs.

While you’re working with

OSC 2

’s tuning, try experimenting with the

1PITCH

parameter. Press

OSC 2

’s

VIEW

button, then press soft knob 1 to select the

TUNE

page if

it’s not already active. Use soft knob

to turn

1PITCH

on and off. Experiment with

varying the amount of FM as well the tuning controls for

OSC 2

Notice that there’s a

MOD

button adjacent to the

OSC 2 FM

knob. This indicates that the

amount of

OSC 2

modulating

OSC 1

can itself be modulated by any of 79 modulation

sources, which provides for some interesting possibilities.

To FM Modulate OSC 2 by OSC 1
To route

OSC 1

to FM

OSC 2

, press one of

OSC 2

’s

MOD

buttons and select

OFFSET

ONLY

(the first parameter in the list) as the mod

SOURCE

with soft knob

. As

described on the next page, select

OSC 1

as the

NZEXT

source. Select

EXT -> EXP FM

(the last parameter in the list) as the

DEST

with soft knob 7 and experiment with

different

OFFSET

levels.

To FM Modulate a Filter by an Oscillator
The filters can be modulated by the oscillators. In the

WAVE

page, use soft knob 8 to

set

FILTFM

for either or both Osc 1 and Osc 2. These sources will appear in

the Filters'

CV SOURCE

parameters as

FILTFM

. If Filter 1's

CV IN

control is up, and

either filter has

FILTFM

as its CV source, the filter will be modulated.