Mode 6: Single channel vocoder
Quick start guide for the connections:
Inputs signals:
mic
: Microphone input, balanced 3.5mm TRS plug
modulation 1
: No function
modulation 2
: No function
envelope
inputs:
envelope
1: Amplitude modulation
envelope
2: No function
envelope
3: Spectral shift modulation
envelope
4: No function
envelope
5: Noise modulation
envelope
7: optional CV note input if the PCB switch is closed
envelopes
6 and 8: N.C.
Notes: A vocoder is typically used without external envelope modulation; in that case connect all the
envelope inputs 1,3, and 5 to the
D.C. out
output for enabling the corresponding functions.
Outputs:
Output is normally from the
out
TRS jack.
Adjustments:
adjust 1
: spectral shift (“big speaker”/”small speaker” effect)
Slider 1
: On/off, automatic/manual noise control. If off, or fully down, the noise characteristics can be
adjusted using sliders 2 - 5, otherwise an automatic noisiness decision is made in the vocoder.
Slider 2
: If Slider 1 is off, adjusts the noise level at the frequency band corresponding to the fundamental,
otherwise it adjusts the sensitivity for automatic noise generation for the fundamental. Note that
envelope
5
modulation only works in the manual mode.
Slider 3
: Corresponding noise adjustment for harmonics 2&3.
Slider 4:
Corresponding noise adjustment for harmonics 4&5.
Slider 5
: Corresponding noise adjustment for all the remaining harmonics.
Slider 6
: Noise gate: clips the bottom of the analyzed speech spectrum which typically is noisy; increased
clipping also removes lower spectral contents for possibly desired sound coloring.
Slider 7
: Temporal control of spectral variations: if off, very slow response like in legacy analog vocoders,
typically keep at maximum for rapid response.
Slider 8
: Spectral shaping; exaggerates the differences of spectral peaks and valleys when shifted upwards
from the off-position. Keep off if you are happy with the original spectrum envelope.
Sliders 9 - 11
: Control of the interpolation between the analyzed spectral bands. These are all on-off
controls and their change only comes into effect after system reset or mode change. When all sliders 9 - 11
are off at the minimum position, the interpolation is maximally smooth. This results in decreased spectral
resolution, but minimizes possibly unwanted effects with rapid note changes that vary the spectrum.
Pulling higher sliders up improves step by step the spectral resolution. Note that always the highest number
25
