Make Noise DPO Quick Start Manual

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©2015 - Compiled by Robert Anselmi Reason101.net Visit www.makenoisemusic.com for full manualMake Noise DPO Complex Dual VCO ModuleThe DPO is a dual VCO designed for generating complex waveforms and implementing FM synthesis in the analog domain. Expanding on the classic arrange-ment of primary and mod oscillators, the DPO has both of the VCOs operable as complex signal sources. It is, in essence, a Dual Primary Oscillator. DynamicFM, Circular FM, Hard Sync and Additive Harmonic synthesis processes are all achieved with internal routing on the DPO. The DPO has two modulation buses(Mod & FM), each with multiple destinations, the depth of which is adjustable per destination. The DPO is a 100% analog, vintage voiced musical instrument.OSCILLATORA WAVEFORMOUTS: Trianglewave output.10Vpp. Sawtoothwave output.9Vpp. Sine waveoutput. 10Vpp.SHAPE ROTARY, SHAPE CV IN & ATEN-UATOR: The Shape Rotary is a unipolar controlthat determines the shape of the waveform feed-ing the Fold circuit. Morphs from Sine to Spike toGlitched Triangle. The Shape CV In is a unipolarcontrol signal input normalled into the Mod Bus.Range: 0V to +5V. The Shape Attenuator is aunipolar level control for the Shape CV Input.OSCILLATOR BWAVEFORM OUTS:Sine wave output.10Vpp. Square waveoutput. 9Vpp. Final waveoutput is processed bythe Shape, Angle & Foldcircuits. 10Vpp.ANGLE ROTARY, AN-GLE CV IN & ATTENU-ATOR: The Angle Rotarytilts the added harmonics toeither end of the wave-cycle.The Angle CV In is a bipolarcontrol signal input normalledinto the Mod Bus. Range: 8V.The Angle Attenuator is aunipolar level control for theAngle CV Input.FOLD ROTARY, FOLDCV IN, FOLD ATTENU-ATOR & STRIKE GATE IN: The Fold Rotaryis a unipolar control that continuously varies thelow-order harmonics of the signal by folding thewaveform into itself. Fold CV In is a unipolar controlsignal input normalled into the Mod Bus. Fold At-tenuator is a unipolar level control for the Fold CVInput. The Strike Gate In, when patched, brieflyopens the Fold circuit to 100%. Requires an 8V -10V gate or clock to operate.VCO A COARSE TUNE RO-TARY: Controls coarse tuning foroscillator A frequency. Range: 9.5octaves; 12hz-6khz.VCO B COARSE TUNEROTARY & VCO B 1V/OCT SCALE TRIM: Con-trols coarse tuning for oscil-lator B frequency. Range: 9.5octaves; 12hz-6khz. The 1V/Octave Scale Trim control isused to calibrate VCO B.VCO A FINE TUNE ROTARY:Controls fine tuning for oscillator Afrequency. Range: 1.75 octaves.VCO B FINE TUNE RO-TARY: Controls fine tuningfor oscillator B frequency.Range: 1.75 octaves.VCO A 1V/OCT SCALE TRIM:Used to calibrate VCO A.VCO A 1V/OCTAVE CV IN:Bipolar pitch control for VCO A.Optimal range: +/-5V.VCO B 1V/OCTAVE CV IN:Bipolar pitch controlfor VCO B. Optimalrange: +/-5V.VCO A EXPONENTIAL CV IN& ATTENUATOR: Bipolar expo-nential frequency CV input for VCOA. Normalled to FM Bus. Range:10V. The associated ExponentialAttenuator acts as a unipolar levelcontrol for the Exponential CV Input.VCO B EXPONENTIAL CV IN & ATTENUATOR: Bipolar exponen-tial frequency CV input for VCO B. Normalled to FM Bus. Range: 10V. TheExponential Attenuator acts as a unipolar level control for the CV Input.MOD BUS INDEX ROTARY, EXTERNAL SOURCE IN,INDEX IN, ATTENUVERTOR & LED: The Mod Bus IndexRotary is a unipolar control that sets the depth of the Mod Bus.The Mod Bus External Source Input interrupts internal routingof VCO A sine wave as a modulation source. Range: +/- 8V. TheMod Bus Index CV Input is a bipolar CV input signal. Range:+/- 4V. The associated Mod Bus Index Attenuvertor acts as abipolar level control for the Mod Bus Index CV Input. The ModBus Index LED provides visual indication of the currently pro-grammed Mod Index value.FM BUS ROTARY, INDEX CV IN, ATTENUVER-TOR & LED: The FM Bus Rotary is a unipolar controlthat sets the depth of the FM. The FM Bus Index CV Inputis a bipolar CV input. Range: +/-4V. The FM Bus IndexAttenuvertor acts as a bipolar level control for the FM BusIndex CV Input. The FM Bus Index LED provides visualindication of the currently programmed FM Index value.FOLLOW CV IN & ATTENU-ATOR: The Follow CV Input is aunipolar control. Range: 0V to 5V. TheFollow Attenuator determines howwell VCO A follows VCO B. With noth-ing patched to Follow CV In, it acts asa standard control. When patched, itacts as an attenuator for that signal.BEAT FRE-QUENCYLED: Providesvisual indicationof the phasedifferencebetween VCOsA & B.VCO A LINEAR CV IN & ATTENUATOR:Unipolar linear frequency CV input for VCO A.AC coupled. Normalled to FM Bus. Range: 10V.The associated Linear Attenuator acts as aunipolar level control for the Linear CV Input.VCO B LINEAR CV IN, LINEAR ATTENUATOR & EXTERNAL LOCKIN: Unipolar linear frequency CV input for VCO B. AC coupled. Normalled to FMBus. Range: 10V. The associated Linear Attenuator acts as a unipolar levelcontrol for the Linear CV Input. External Lock In allows VCO B to be phaselocked to a hard-edged signal (square, pulse or Sawtooth) from other VCOs.VCO MODE BUTTON: Cyclesbetween 4 modes (indicated byLED): No LED: Standard, Lock(Blue LED): VCO A is phase lockedto VCO B. Sync (Pink LED): VCOA is Hard Synced to VCO B. LFO(Amber LED): VCO A acts as a lowfrequency oscillator.Follow: Follow is useful in maintaining FM or Sync ratios while controlling the DPO with a sequencer or keyboard. The lag that occurs when Follow is set toless than 100% will introduce moments of dissonance and noise, due to the temporary tracking errors. This is a wonderful way to introduce uncertainty to anotherwise stable sequence of notes.FM Bus: The internal FM bus is hardwired for Sine wave in both directions. With nothing patched to the Linear and/or Expo FM inputs, the associatedattenuator sets the final index of FM applied to each destination. As you increase the Index level, the amplitude of VCO A sine bused to VCO B Linear FMand Expo FM attenuators is increased. At the same time, the amplitude of VCO B sine bused to VCO A Linear FM and Expo FM attenuators is increased.Therefore, you could have different amounts of Linear and Expo FM in both directions, all at once. At greater than 90% Index, all four FM bus lines (Linear& Expo for both VCOs) go into overdrive when the associated attenuators are set to beyond about 80%. The FM overdrive, combined with the bi-directionaldynamic FM, results in some extreme circular FM capabilities. These sounds will get out of hand quickly. The key to controlled FM within the DPO is attenua-tion, since setting the Index to 100% really does push the circuit to its limit.Mod Bus: The internal Mod Bus Source is hardwired for VCO A Sine wave, with the power to use any external source by patching to the External SourceCV In. With nothing patched to the Shape, Angle and Fold CV inputs the associated attenuator sets the final amount of modulation applied to the destination.As you increase the Index level, the amplitude of VCO A Sine bused to the Shape, Angle and Fold jacks is increased. Therefore, you could have differentamounts of modulation at each of those three destinations (Shape, Angle, and Fold).