Access Virus TI, User Manual

Page: 25 / 218

25 FIRST STEPS
ENV AMOUNT
Controls how much the filter envelope affects cutoff – like auto-
mating the CUTOFF knob with each and every note you play.
Here's how to make a very simple analogue bass sound:
Restore ROM-A127 and turn CUTOFF down to minimum. Play
individual notes while adjusting ENV AMOUNT until you hear a
satisfying “plunk” (somewhere around 70), then take the RESO-
NANCE up a little. Locate the TRANSPOSE buttons to the left of
the display, and change the setting to -1 or -2. Play your favour-
ite funky bass riff…
The FILTER ENVELOPE section has the same structure as the
AMPLIFIER ENVELOPE, so you should already know how to
use these knobs effectively to modify your bass sound. Don’t
forget to try SUSTAIN SLOPE (SHIFT + SUSTAIN). You should
try adjusting ENV AMOUNT and RESONANCE again – filter
parameters are highly interactive!
FILTER BALANCE
At -64 you can only hear the output of filter 1. In the central
position (0), both filters contribute equally. At +63 you can only
hear the output of filter 2.
SELECT (FILT 1, FILT 2)
Use these buttons to select which of the filters you would like
the RESONANCE and ENV AMOUNT knobs to control. If you
press both buttons at the same time, the knobs will apply to
both filters simultaneously (as they already do in ROM-A127).
CUTOFF 2
A separate cutoff control for filter 2. This can be either an offset
(i.e. a constant amount below or above filter 1) or an independ-
ent value, depending on another parameter in the filter’s EDIT
menu (see “Cutoff Link” on page 145).
MODE (FLT1, FLT2)
Using the FILT1 and FILT2 buttons, you can set each filter to
one of following types:
> LP = Low Pass: Allows frequencies below the cutoff point to
pass through i.e rejects those above the cutoff point
> HP = High Pass: Allows frequencies above the cutoff point to
pass through i.e. rejects those below the cutoff point
> BP = Band Pass: Allows frequencies close to the cutoff point
to pass through i.e. simultaneously rejects those above and
below the cutoff point