ALESIS ANDROMEDA A6 - Manual (Page 185)

Chapter 8: Pre Filter, Post Filter and Voice Mixes
A NDROMEDA A6 R EFERENCE M ANUAL 183
C
HAPTER
8
P
ROGRAM
F
UNCTIONS
P
ART
4:
T
HE
A
NDROMEDA
’
S
M
IXING
S
YSTEM
One of the most useful and exciting features of the A6 is its ability to mix sound
signals in a multitude of ways. Having a wide choice of audio paths – routes that the
oscillators and other sound sources can take as they make their way through the A6 –
provides another set of power tools that you can use to create sounds.
The PRE FILTER MIX , POST FILTER MIX and VOICE MIX are modules used to blend the A6’s
sound for the Programs. VOICE MIX is also important when setting the levels of
different Mix Channels in Mix Mode. But for now, we’ll focus our efforts on Program
functions.
P
RE
F
ILTER
M
IX
/P
OST
F
ILTER
M
IX
The PRE FILTER MIX and POST FILTER MIX modules are used in conjunction to mix the
levels of the A6’s sound sources, the Ring Modulator of each voice, and the two
Filters.
PRE FILTER MIX controls the A6’s sound sources going into the Filters and POST
FILTER MIX handles the Filter outputs plus several unfiltered signals going into the
VCA controlled by Envelope 3.
PRE FILTER MIX O VERVIEW
The PRE FILTER MIX module contains six knobs that control the initial output levels of
their respective sound sources before they are processed by the Filters and then have
their final output levels set in
VOICE MIX . It is the PRE FILTER MIX module that you use
to mix the relative output levels of the VCOs (and add in their sub-oscillators if
desired), select and mix in a noise source or external audio (but not both), mix in
Filter Feedback, and set the level of the Ring Modulator. All of these sound elements
can be mixed into a Program at the same time.
You can route the “output” of PRE FILTER MIX – any combination of the VCOs ( OSC 1
and OSC 2 ) plus their sub-oscillators ( SUB OSC ), the Ring Modulator ( RING MOD ),
Noise/External Audio ( NOISE EXT ) and FILTER FEEDBACK from the POST FILTER MIX –
in a number of different ways:
• into FILTER 1 only
• into FILTER 2 only
• into both Filters in parallel – each Filter processes the PRE FILTER MIX signal
independently and at the same time
• into both Filters in series – the output of PRE FILTER MIX goes first into FILTER 1 ,
then into FILTER 2 , effectively permitting the “filtering of a filter”
The Ring Modulator is especially interesting in that you can route it into the Filters as
above, bypass the Filters altogether (it has a direct route into POST FILTER MIX ) or have
both the Filtered and unfiltered signals at once. See the topic on the following page
for the complete story.
Note that all audio sources are available at the same time, with the exception of
Noise or External audio – you must select one or the other.
In addition, each level control in the PRE FILTER MIX has its own MOD button for
controlling levels from any of the modulation sources. You can modulate the levels
of the VCOs and their sub-oscillators, the level of the Ring Modulator and the level of
the Noise Generator/External Inputs.