Alesis A6 User Manual

Chapter 8: Pre Filter, Post Filter and Voice Mixes

A

NDROMEDA 

A6 R

EFERENCE 

M

ANUAL

187

Signal Routing through the Filters

The 

 outputs of 

 and 

 (along with their respective 

signals), the 

 and 

 can be routed through the A6 using the

following procedures.

Please note that the 

 output always goes to 

 unless, of course,

 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 

: 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 

s if you like by turning the knobs clockwise.

Check that the 

 knob in 

 is turned up and adjusted to provide a

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

 as a starting point. The

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

• To process external audio through 

 only, turn up the 

 knob.

This causes 

 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 

, make sure that the 

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

.

• To process external audio through 

 only, press the 

 button

located on the front panel between the two Filters until the 

 LED lights.

This routes the output of 

 into 

. Then turn up the 

 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 

 function is active, the output of 

 flows

into 

 independently of 

. Use the 

 knob to control the

level. And since the output of 

 is normally routed to 

,

use any (or all) of the 

 knobs to mix in the output of 

.

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

 levels, 

 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 

 button

until either the 

 LED lights or the 

 (bandpass) LED lights. When

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

 will flow into 

. Here are the details:

- When using 

 as the input, remember from Chapter 5 that the notch

in the 

’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 

 and turn down the 

 knob

which effectively gives you a “

” input instead of 

 as it is

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

 and