Pittsburgh Modular Microvolt 3900, Manual

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19. Microvolt Patch Example 2
Inverted Filter Frequency Modulation (A Deeper Look at the Inverting Mixer / Splitter / Offset Section)
This patch uses the Inverting Mixer / Splitter / Offset Section to invert the output of the Function Generator before
it is sent to the frequency modulation input of the binary filter. Understanding this patch will further expand the
toolset available in the patch bay. The important user interface controls are highlighted in blue but all of the
controls of the Microvolt 3900 can impact the sound and functionality of the patch. Once the initial patch is set up,
experiment with one setting at a time to understand its effect on the signal path.
The output of the function generator (134) is manually patched into mixer input a (135). The input a level
attenuverter is turned full left to invert the function generator signal. The output of the mixer (137) is then patched
into the frequency modulation input of the filter (120).