Dave Smith Instruments Poly Evolver, Operation Manual

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26
Page 14:
Misc Audio
Highpass:
Out 0…99, In 0…99 Sets the cutoff frequency of the four-pole
highpass filter. If set from Out 0 to Out 99, the filter is placed after the analog lowpass
filter and VCA, before the Delay. Conversely, if set from In 00 to In 99,
the highpass
filter is inserted before the analog lowpass filter, and only affects external input. Refer
to the Signal Flow diagram on page 12. There are two separate highpass filters, one
for each channel, that are controlled in tandem.
Remember that any of the modulation sources can be routed to control the Highpass
Filter; for example Envelope 3 can be dedicated to the Highpass.
Noise Vol: 0…100 The volume of white noise mixed into the filter. The
same amount goes into both channels.
Ext In Vol:
0…100 The volume of external audio input connected to Left
In and/or Right In. The same signal is routed to all four voices.
Ext In:
see table Selects the external signal input mode. Note that the
same signal goes to all four voices; this can be useful in Combo mode to do multiple
parallel processing of an external audio signal. Or, the output of one voice can be
routed to the input of another voice.
Display External Audio Input Mode
Stereo
Stereo – the left channel in goes to the left channel, right to
right.
Left
Left – the left channel in goes to both channels (mono in).
Right
Right – the right channel in goes to both channels (mono in).
Split
Split - A mono audio signal is input on the Right Input; a
separate control audio signal (for envelope follower, peak hold,
and clock source) into the Left Input.
Input Hack:
0…14 Trashes the external input signal, quite rudely. But,
the analog filter tames it nicely. A good way to mess up a clean stereo signal.
Distortion:
Out 0…99, In 0…99 Amount of distortion. If set from Out 0
to Out 99, the distortion is after the analog filter and VCA, before the Delay. If set from
In 00 to In 99,
the distortion is before the analog filter, and only affects external input.
There are two separate distortions, one for each channel.
Note - there is a built-in noise gate that is enabled when distortion is not zero. If
you want to use the noise gate but without distortion, use a distortion setting of In
01
(noise gate on input signal), or Out 01for a noise gate after the analog
electronics. The noise gate uses the Left channel signal level to gate both
channels.
Output Hack: 0…14 Trashes the output signal, quite rudely.