Access os5 Manuale Utente
ACCESS VIRUS OS5
151
Oscillators
trols the filters cutoff frequency and creates a
typical "Autowah" effect, whereby the filter is
opened according to the drumloop's volume
(respectively its beats). In addition to this, or as
an alternative, you can control other parame-
ters. Of course you can also use the external
signal as the modulation sour ce without
processing it in the VIRUS at all.
typical "Autowah" effect, whereby the filter is
opened according to the drumloop's volume
(respectively its beats). In addition to this, or as
an alternative, you can control other parame-
ters. Of course you can also use the external
signal as the modulation sour ce without
processing it in the VIRUS at all.
When the Envelope Follower is activated it re-
places the filter envelope, so that when Env
Amount is turned up, it directly affects the filter
frequencies. Any other parameter can be mod-
ulated with the Envelope Follower via the Mod-
ulation Matrix (ASSIGN). Select FiltEnv as the
modulation source
places the filter envelope, so that when Env
Amount is turned up, it directly affects the filter
frequencies. Any other parameter can be mod-
ulated with the Envelope Follower via the Mod-
ulation Matrix (ASSIGN). Select FiltEnv as the
modulation source
Three filter envelope knobs are used to control
the envelope follower when it is active:
the envelope follower when it is active:
ENVELOPE FOLLOWER ATTACK
(Knob: FILTER ATTACK ) controls the attack rate
of the envelope follower. With this parameter,
you can determine how fast the envelope fol-
lower will respond to the rise in signal level.
Higher values slow the envelope follower down
and delay its response.
of the envelope follower. With this parameter,
you can determine how fast the envelope fol-
lower will respond to the rise in signal level.
Higher values slow the envelope follower down
and delay its response.
ENVELOPE FOLLOWER RELEASE
(Knob: FILTER DECAY) controls the decay time
of the envelope follower. With this parameter,
you can determine how swiftly the envelope fol-
lower will respond to a decrease in signal level.
Higher values let the Follower linger.
of the envelope follower. With this parameter,
you can determine how swiftly the envelope fol-
lower will respond to a decrease in signal level.
Higher values let the Follower linger.
ENVELOPE FOLLOWER GAIN
(Knob: FILTER SUSTAIN) controls the input level
of the envelope follower directly. The nominal
value is the center position (64).
of the envelope follower directly. The nominal
value is the center position (64).
OSCILLATORS
PULSE WIDTH MODULATION
Pulse width modulation is a very effective meth-
od for producing beat oscillations without hav-
ing to resort to several detuned oscillators.
od for producing beat oscillations without hav-
ing to resort to several detuned oscillators.
Dial OSC BALANCE to the far left so that only
OSC1 is audible, then select the waveform
Pulse for this oscillator (OSC1 Shape to the
right). Slowly turn the Pulse Width (PW) knob
back and forth. As you change its pulse width,
you’ll hear movement in the sound itself. When
its pulse width remains fixed, the sound will re-
main static. This to-and-fro pulse width modu-
lation can be automated by means of an LFO.
Select PWM for LFO1 Amount and set a rela-
tively high modulation amount. You can vary the
intensity of the modulation via LFO Rate.
OSC1 is audible, then select the waveform
Pulse for this oscillator (OSC1 Shape to the
right). Slowly turn the Pulse Width (PW) knob
back and forth. As you change its pulse width,
you’ll hear movement in the sound itself. When
its pulse width remains fixed, the sound will re-
main static. This to-and-fro pulse width modu-
lation can be automated by means of an LFO.
Select PWM for LFO1 Amount and set a rela-
tively high modulation amount. You can vary the
intensity of the modulation via LFO Rate.
Now when you play different sounds, you’ll will
find that the intensity of the modulation is con-
siderably greater with low-frequency sounds
than it is with higher-frequency sounds. This is
due to the fact that the LFO frequency does not
follow the pitch. You can compensate for this
effect by activating and adjusting the function
LFO1 KEYFOLLOW. When you set LFO1 KEY-
FOLLOW to a value of 127, the LFO rate will fol-
low whatever pitch you play precisely (in
octaves).
find that the intensity of the modulation is con-
siderably greater with low-frequency sounds
than it is with higher-frequency sounds. This is
due to the fact that the LFO frequency does not
follow the pitch. You can compensate for this
effect by activating and adjusting the function
LFO1 KEYFOLLOW. When you set LFO1 KEY-
FOLLOW to a value of 127, the LFO rate will fol-
low whatever pitch you play precisely (in
octaves).
RELEASE
RELEASE
SUSTAIN
SUSTAIN
(GAIN)
(GAIN)
DECAY
DECAY
ATTACK
ATTACK
0
6
12
12
0
6
12
12
0
6
12
12
0
6
12
12