Pittsburgh Modular Microvolt 3900, Manual

Page: 22 / 70

22
9. Waveform Mixer
The waveform mixer section combines the output of several distinct audio sources.
The harmonic sine button(7) adds subtle wave shaping to the sine wave output.
The noise level trimmer(8) adjusts the level of the analog noise circuit. Patching into the noise output jack(130)
will remove it from the input of the binary filter.
The external gain(9) and external level(10) trimmers work together to control the preamp for processing external
or internal signals. The external gain control offers 1x to 30x gain with integrated soft clipping overdrive. Perfect
for processing external signals or overdriving internal waveforms. Patching into the external output jack(103) will
remove it from the input of the binary filter.
The waveform level siders set the output level of the oscillator waveforms. The output of each waveform level
slider is patched internally to the input of the binary filter using switched jacks. Patching into any of the individual
waveform jacks will remove it from the input of the binary filter.
Waveform Mixer Patching Notes
•
The harmonic sine button(7) adds subtle harmonics to the sine wave. This gives the filter resonance
something to grab on to for smooth resonated filtering.
•
Adding the sine wave to other waveforms can add additional low end to the sound. Switch the harmonic sine
on and off to hear which one sounds the best to beef up the other waveforms.
•
Patch the output of the filter(122) or dynamic vca(125) into the external input (102) then adjust the external
gain(9) and external level(10) to beef up or blow out the waveforms.
•
External instruments can be inserted into the Microvolt 3900 signal path using the external input(102).