27 | Mixer & Noise
EXTERNAL INPUT VOLUME
An external audio source can be introduced to Minimoog
Model D using the EXT. INPUT SIGNAL jack located on
the Top Patch Panel. The Volume of the external signal is
controlled using this knob.
If no cable is connected to the EXT. INPUT SIGNAL jack,
the main audio output of Minimoog Model D is attenuated
slightly and then normalled to the External Input signal path.
In this case, the Main Output signal is sent back to the input
of the mixer. By increasing the External Input volume far
enough, the Mixer can overload, introducing varying levels
of overdrive or distortion. When this occurs, the Overload
indicator lamp will light. In this case, the External Input
Volume control is post Main Output volume. This means that
the MAIN OUTPUT VOLUME knob will aect the amount of
overload in addition to the EXTERNAL INPUT VOLUME knob.
CRITICAL NOTE: With no cable connected to the EXT. INPUT
SIGNAL jack, and the EXTERNAL INPUT VOLUME and MAIN
OUTPUT VOLUME controls turned all the way up, it is possible to
overload the mixer to the point that only one sound is heard and
dierent pitches do not sound. This will not damage the instrument.
NOISE
Noise can be a very desirable sound source—either alone or
mixed in with other sources. It can be used to create anything
from a rocket launch to the subtle breath of a flute sound.
In addition to the NOISE VOLUME knob, there is a switch for
selecting either WHITE or PINK noise. White Noise contains
equal energy per frequency. Pink Noise contains equal
energy per octave of the audio spectrum, and is perceived
as having more low-frequency components. If you think
of White Noise as TV static, consider Pink Noise more as a
waterfall pounding the rocks below.
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