The arpeggiator automatically generates an arpeggio (broken chord) when
you hold down a chord on the keyboard. For programs that use two tim-
bres, you can apply the arpeggiator to either or both timbres. This is a step
arpeggiator with six arpeggio types.
A vocoder analyzes the frequency characteristics of one signal called the
"modulator" (such as a human voice input via a mic) and applies these
characteristics to a filter that is processing a different signal called the "car-
rier" (such as an oscillator waveform), thus producing distinctive effects
such as an instrument that appears to be talking.
The microKORG XL+ contains a sixteen-band vocoder that can simulate
not only the classic vocoder sounds of the past but also create original
vocoder sounds where the tonal character or the level of each band can be
As shown in the illustration below, the vocoder consists of the carrier (the
signal being modified), the modulator (the signal that controls the modify-
ing), and the vocoder section itself.
Vocoder Sw= ON
Vocoder Sw= ON & Modulator AudioSrc =Timbre2
CUTOFF (FC MOD)
Vocoder section (VOCODER)
This consists of two sets of sixteen bandpass filters (the analysis filter and
the synthesis filter) and an envelope follower. The audio signal input to the
modulator is sent to sixteen filters (the analysis filter), and an envelope fol-
lower will detect the volume envelope (time-variant change) of each fre-
The carrier signal is sent to a separate set of sixteen filters (the synthesis
filter), and the envelope detected from the analysis filter is used to control
the volume of each band in the synthesis filter, thus varying the tonal char-
acter of the carrier signal and producing the impression that the carrier sig-
nal is talking. It is also possible to shift the frequencies of the carrier
bandpass filter. This allows you to raise or lower the frequency response
while preserving the character of the modulator, creating dramatic changes
in the sound.
Editing the sound
To Timbre 1