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State Zero

Reference Manual

Copyright 2010, Mungo Enterprises

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Summary of Contents for State Zero

Page 1: ...State Zero Reference Manual Copyright 2010 Mungo Enterprises ...

Page 2: ...State Zero 1 ...

Page 3: ...ator 22 Sample and Hold 22 Slew Rate Limiter 24 Curve and Quantize 24 Mixer 26 Sources 28 Tempo 30 Audio 30 Memory 32 Voice 32 Synthesis Techniques 34 Normalling 35 Portamento 35 Legato 36 Fingered Portamento 36 Filter Resonance 37 Envelope Curves 37 Envelope Variations 38 Envelope Hold 38 Service Notes 40 Shipping 41 Wood Care 41 Routine Maintenance 41 Case Access 42 Part Replacement 42 Repairs 4...

Page 4: ...State Zero 3 ...

Page 5: ...State Zero 4 Connections ...

Page 6: ...State Zero 5 ...

Page 7: ...s switched off at the wall for both State Zero and the monitor Audio The stereo inputs and outputs are via balanced TRS plugs Both inputs and outputs are DC coupled to allow interfacing with CV signals to from modular synthesisers Midi Midi input and output is on standard 5 pin 180 degree DIN connectors The synthesiser only responds to messages on channel 1 Patchfield The patch points of the synth...

Page 8: ...State Zero 7 ...

Page 9: ...State Zero 8 Module Reference ...

Page 10: ... and their output being on the right Patching is simplified by the absence of multiples rather every input and output is a pair of connected jacks allowing a signal to be endlessly chained between inputs Most modules have several parameters that are continuously variable each of these are available as a pair of knobs and a signal input Called control voltages in conventional synthesisers there are...

Page 11: ...n microseconds and is disabled while the oscilloscope is in roll mode Further a simple spectrum analyser red trace is available on the primary channel Operating from the waveform captured on screen it is scaled in decibels vertically and octaves horizontally Again it is disabled while the oscilloscope is in roll mode The second timebase of the oscilloscope displays the left audio output blue trace...

Page 12: ...State Zero 11 ...

Page 13: ...ecreases the zoom level of the last knob adjusted Pressing both together zeros the value Number Increases decreases the value of the last knob adjusted by a single step regardless of zoom control Pressing both together zeros the value Program Selects program number Mode Selection of zoom number and program modes ...

Page 14: ...State Zero 13 ...

Page 15: ... is displayed as a percentage Symmetry Square Pulse width from 0 to 1 expressed as a percentage of full range from 0 5 Sawtooth Ramp shape from negative going sawtooth to positive going sawtooth expressed as a percentage of full range from symmetric triangle Sinusoid No effect Waveform Output selection of sinusoid ramp or square waveform Synchronization Resets the phase of the oscillator to zero p...

Page 16: ...State Zero 15 ...

Page 17: ...e source achieves an eighth note period Offset is displayed in Octave Semitone Cent quantities Phase Advances or retards phase of the oscillator up to 1 period Offset is displayed as a percentage Waveform Output selection of sinusoid triangle or positive going sawtooth waveform Synchronization Resets the phase of the oscillator to zero plus minus phase offset Triggered by a positive going edge thr...

Page 18: ...State Zero 17 ...

Page 19: ...o full scale per sample Level Final level of envelope stage expressed as a percentage of full scale from zero Synchronization The first stage of the envelope is triggered on a positive going edge through zero and two stages follow it The final stage is triggered on a negative going edge through zero ...

Page 20: ...State Zero 19 ...

Page 21: ...atural scaling about A440 down 1 octave 9 semitones and 23 cents while self oscillating at 24dB octave Offset is displayed in Octave Semitone Cent quantities Slope Output selection of 24dB octave high pass 12dB octave low pass or 24dB octave low pass Amplifier Level Exponential response expressed as a percentage over its range ...

Page 22: ...State Zero 21 ...

Page 23: ...r Level Threshold for comparison output is positive full scale for input threshold and negative full scale for input threshold Sample and Hold Synchronization The input value is captured on a positive going edge through zero ...

Page 24: ...State Zero 23 ...

Page 25: ...onse expressed in nominal units from 0 infinite hold to full scale per sample Curve and Quantize Curve Variable transfer function from soft clipping through logarithmic linear and exponential to crossover distortion Expressed as a percentage of full range from linear Quantize Step size of quantization from zero to full scale expressed as a percentage ...

Page 26: ...State Zero 25 ...

Page 27: ...State Zero 26 Mixer Level Amplitude of input expressed as a percentage Note the sum of the 4 channels is saturated to full scale ...

Page 28: ...State Zero 27 ...

Page 29: ...Sources Pitch Master pitch source Gate Square wave of key press Accent Velocity of key press Pitch bender Value of pitch bend wheel Modulation Value of modulation wheel Noise Uniformly distributed white noise source ...

Page 30: ...State Zero 29 ...

Page 31: ...ion of quarter eigth or sixteenth note length Clock Square wave clock with 0 5 duty cycle at the selected rate Rate Tempo rate independent of clock period selection Audio Audio Input Source supplied from audio inputs Audio Output Destination for audio outputs ...

Page 32: ...State Zero 31 ...

Page 33: ...hey are in program mode the voice will be stored on release of the save button Pressing the save button without changing the program number or sending a program change command will load the voice from the current program number To load a specific voice select its program number with the increment decrement keys in program mode then press and release the save button Voice Polyphony Selection of mon...

Page 34: ...State Zero 33 ...

Page 35: ...State Zero 34 Synthesis Techniques ...

Page 36: ...ons in coloured pen on the front panel Historically modular synthesisers offered a ring around each knob so that settings could be recorded by marking the desired position of the pointer and the choice of a white face plate for State Zero is no coincidence STAEDTLER Lumocolor non permanent pens in the medium or broad size are perfect for this application Portamento No dedicated portamento function...

Page 37: ...slides between notes that are played overlapping Again the simplest way to achieve the discrimination between notes that are overlapped or not is to pass the gate signal through a slew rate limiter or low pass filter Setting both the up and down rates to the correct speed will keep the output signal negative for notes played without overlap and positive for those played overlapped This signal can ...

Page 38: ... to reduce gain for larger signals This will greatly increase the gain for small signals and the feedback gain will need to be adjusted accordingly Due to the delay in the feedback loop high frequency oscillations can occur above the rolloff frequency of the filter when the feedback gain is set very high As these oscillations only occur at higher frequencies it is possible to eliminate them by hav...

Page 39: ...ng for the 2nd stage and its level close in value to that of the 1st stage Staccato Setting the 1st stage to a level of 0 and a very fast rate and using the 2nd stage as the attack component the envelope will always rise from 0 for well defined staccato voicing Envelope Hold Envelopes will always retrigger on a positive going edge through zero at their synchronization input If a true hold time is ...

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