Signal routing through the filters – ALESIS ANDROMEDA A6 User Manual

Page 189

Chapter 8: Pre Filter, Post Filter and Voice Mixes

NDROMEDA

A6 R

EFERENCE

ANUAL

187

Signal Routing through the Filters

The

PRE FILTER MIX

outputs of

OSC 1

and

OSC 2

(along with their respective

SUB OSC

signals), the

RING MOD

and

NOISE EXT

can be routed through the A6 using the

following procedures.

Please note that the

PRE FILTER MIX

output always goes to

FILTER 1

unless, of course,

FILTER BYPASS

is on. The following procedures will inform you how to turn the

Filters on or off using their respective level knobs, as well as other Filter “mixing”
methods you’ll find useful.

Tip: For these examples, you can experiment with any of the components in

PRE

FILTER MIX

: the procedures are applicable for any of them or all of them, should

you need to mix in levels of all four knobs.
For the component you select, turn its knob to its 2 o’clock position. This will
give you a moderate output level to work with. If you are trying out the VCOs,
you can also mix in their

SUB OSC

s if you like by turning the knobs clockwise.

Check that the

LEVEL

knob in

VOICE MIX

is turned up and adjusted to provide a

comfortable listening level.
Last, turn down all the knobs in

POST FILTER MIX

as a starting point. The

examples that follow will tell you what knob to use when appropriate.

• To process external audio through

FILTER 1

only, turn up the

FILT1 LP

knob.

This causes

FILTER 1

to output its lowpass-filtered signal. To have the Filter

output other filtered signals – highpass, bandpass or notch – turn up their
respective knobs. (We’ll provide details on these controls under the

Filter

Output Controls

topic on the following page.)

To be certain that you’re only hearing

FILTER 1

, make sure that the

FILT2 LP

knob is turned fully counter-clockwise. This shuts off the output of

FILTER 2

• To process external audio through

FILTER 2

only, press the

F2 INPUT

button

located on the front panel between the two Filters until the

MIX

LED lights.

This routes the output of

PRE FILTER MIX

into

FILTER 2

. Then turn up the

FILT2

knob and make sure that all the other knobs in this module are turned

down.

• To process external audio through filters in parallel, use the first two methods

together: when the

MIX

function is active, the output of

PRE FILTER MIX

flows

into

FILTER 2

independently of

FILTER 1

. Use the

FILT2 LP

knob to control the

level. And since the output of

PRE FILTER MIX

is normally routed to

FILTER 1

use any (or all) of the

FILT1

knobs to mix in the output of

FILTER 1

This functionality of the A6 mixing system provides enormous flexibility: you
can independently mix the levels of two Filters complete with their own

RESONANCE

levels,

KEY TRACK

amounts and modulation. You can even assign

a different envelope to one of the Filters for independent harmonic shaping.

• To process external audio through filters in series, press the

F2 INPUT

button

until either the

NOTCH

LED lights or the

(bandpass) LED lights. When

either of these two LEDs are on, that means that the respective output of

FILTER 1

will flow into

FILTER 2

. Here are the details:

- When using

NOTCH

as the input, remember from Chapter 5 that the notch

in the

FILTER 1

’s harmonic spectrum is created by using both lowpass and

highpass filtering together (page 118). The input to Filter 2 is post-fader,
meaning that you can turn up the

FILT1 LP

and turn down the

FILT1 HP

knob

which effectively gives you a “

LOWPASS

” input instead of

NOTCH

as it is

labeled on the front panel. Conversely, you can turn down

FILT1 LP

and