Access os5 Manuale Utente
ACCESS VIRUS OS5
133
Vocoder
THE MODULATOR BANK
This cascade of bandpass filters split the fre-
quency spectrum of the modulator into slices,
quite similar to the way a studio frequency ana-
lyser would.
quency spectrum of the modulator into slices,
quite similar to the way a studio frequency ana-
lyser would.
THE ENVELOPE FOLLOWER
The level at the output of each bandbass filter is
measured by the modulator bank. The resulting
control signal can be modified by an ATTACK
and DECAY parameter. These signals are no au-
dio signals, as they contain the envelope of the
signal being analysed.
measured by the modulator bank. The resulting
control signal can be modified by an ATTACK
and DECAY parameter. These signals are no au-
dio signals, as they contain the envelope of the
signal being analysed.
THE CARRIER BANK
The signal is treated in a similar way to the sig-
nal which passes the modulator bank. In this
case, the carrier signal is split by the bandpass
filters. Each bandpass of the carrier bank corre-
sponds to one of the modulator bank. Usually,
both bandpasses use the same frequency slice.
Similar to a synthesizer’s envelope, the signal
level being measured by the envelope followers
of the modulator, is used to control the level of
the carrier’s filter. Last, but not least, the individ-
ually controlled signals of the carrier bank are
reunified to create the vocoder’s output sound.
nal which passes the modulator bank. In this
case, the carrier signal is split by the bandpass
filters. Each bandpass of the carrier bank corre-
sponds to one of the modulator bank. Usually,
both bandpasses use the same frequency slice.
Similar to a synthesizer’s envelope, the signal
level being measured by the envelope followers
of the modulator, is used to control the level of
the carrier’s filter. Last, but not least, the individ-
ually controlled signals of the carrier bank are
reunified to create the vocoder’s output sound.