AS SPAWN Operator's Manual

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Summary of Contents for AS SPAWN

Page 2: Table Of Contents
CONTENTS INTRODUCTION VCLFO MIDI - CV MOD VCA SOURCE MIXER 10-11 12-13 14-15 MIDI - CV 16-19 SPECIFICATION 20-21 BLANK PATCH CHARTS ISOLATION PATCH INTERNAL SIGNAL ROUTE INTERNAL MODULATION ROUTE...
Page 3: Introduction
SPAWN also includes a performance VCA (MIDI - CV MOD VCA) this will accept both audio and control signals and can be controlled by both a control voltage or the internal high performance MIDI - CV convertor.
Page 4: Vclfo
VOLTAGE CONTROLLED LOW FREQUENCY OSCILLATOR The VCLFO is a wide range oscillator (usually operated in the non audio range) used to modulate control inputs, e.g: used for vibrato, tremolo and trill. It is internally routed to the VCO and VCF (see INTERNAL SIGNAL ROUTE page 3). Four waveforms are simultaneously available and the Rate can be altered using the linear CV socket.
Page 5: Vclfo
This output gives a squarewave output of +/-5 volts. This output gives a trianglewave output of +/-5 volts. This gives linear control of the VCLFO rate, e.g: from keyboard or envelope.
Page 6 VO LTAGE CONTROLLED OSCILLATO R The VCO is the primary sound source within SPAWN. It creates the raw waveform which is then processed and modified by the other synthesizer circuits. SPAWN contains a temperature compensated oscillator, conforming to the industry standard logarithmic IV/OCT response.
Page 7 CV keyboard/controller such as the A.S French Connection, Sorceror or Demon when used in the analogue mode. With the ‘Glide’ knob turned to the ‘F’ position (fast) no glide will be present. As the knob is turned clockwise a slewing of the INPUT voltage will increase.
Page 8 The Wave Mod socket and associated Amount pot is the way of externally controlling the waveshape generated by the VCO. The Amount pot also acts as an invertor. So that the initial wave shape can be swept both positively and negatively. For example the...
Page 9: Midi - Cv Mod Vca
Example 2. An audio waveform could be sent to the signal input of the VCA as the CV is increased, the output waveform level would increase patched to the ext sig in the VCF, a performance control could increase the level of the external signal into SPAWN.
Page 10: Voltage Controlled Filter
24dB/oct. The Resonance knob is used to accentuate frequencies around the cut-off point, as the resonances increases the filter will begin to ring and will self oscillate at high resonate settings producing a sinewave (the frequency of...
Page 11 The CV2 socket and associated amount pot is another method of controlling the frequency of the filter. The Amount pot also acts as an invertor so that positive and negative frequency sweeps can be achieved from a positive control voltage...
Page 12 The source mixer is the point at which all internal/external audio signals can be mixed prior to being processed by the VCF. The Signal knob controls the audio signal level coming from the VCO into the VCF. The filter may be over-driven in the range of 7 -10.
Page 13 The Noise Generator in SPAWN generates white noise. White noise is a signal that contains all the audio frequencies in equal amounts but has no recognisable pitches or tones the knob is a level control of noise signal being introduced into the VCF.
Page 14: Voltage Controlled Amplifier
The VCA is an amplifier which allows it’s gain to be altered by a control voltage. The VCA in SPAWN has both logarithmic and linear controls creating unique contours. The signal knob controls the audio signal level coming from the VCF into the VCA. The VCA may be over-driven (clipped) in the range of 7 -10.
Page 15 This is an external input that allows audio and control signals to be processed by the VCA. This is the output of the VCA, as it is also the final output when used as a complete synthesizer a 1/4” socket is...
Page 16 The output of the ENV can control any voltage controlled input. In addition SPAWN’s envelope has an auto repeat function allowing auto envelope contours. The Attack knob controls the amount of time it takes the output voltage to reach the maximum level once the gate is initialised.
Page 17 Midi is internally routed to the gate input allowing easy control from a Midi - Master keyboard/controller. As with other internally routed Midi controls this can be isolated using the switch in the Midi section. This is the trig/retrig input. A short positive pulse will re-initialise the already gated ENV.
Page 18: Midi-Cv
1/ CV to VCO Note that this internal patch by-passes the Glide control on SPAWN. If Glide is required when using Midi, Midi controller no.65 must be activated, and rate of Glide controlled by Midi controller 05 (portamento).
Page 19 This socket provides the output for the Midi generated gate. When no key is pressed on the controlling keyboard no voltage appears at this socket, when a key is pressed (anywhere) on the keyboard approx 10 volts will be available at this socket. It remains at this level while the key is held and drops back to OV on release of the key. This ‘gate’...
Page 20 Midi keyboard the s-trig socket has 10 volts at its output but when a key is pressed this voltage drops to zero volts, this output can drive an envelope requiring a gate for inversion effects but is primarily designed to initialise the envelope shapers on early Moog synthesizers when used as a Midi to CV convertor.
Page 21 Connect this to the MIDI OUT of the keyboard, sequencer or other device with which you wish to control MIDI THRU: Any MIDI data received at SPAWN’S MIDI IN socket will be echoed by the MIDI THRU socket, thus allowing you to connect SPAWN in a ‘daisy chain’ of MIDI devices.
Page 22: Vcf
SPECIFICATION VCLFO Fc Range 0.055 Hz (one cycle per 18 seconds) 33 Hz (33 cycles per second) Waveforms Positive and negative sawtooth, square and triangle waveforms available simultaneously 10v peak to peak +/- 5v. Fc Range 1.5Hz to 16.5KHz Exponential response 1 volt per octave. Internal Fc MOD Square or triangle +/- 1 octave Waveform...
Page 23 Internal Supply +/- 12v DC 90 mA. AC Voltage Select SPAWN has an ‘AC V. SELECT’ switch. It is imperative that this is set correctly. Failure to do so will void warranty and damage the unit beyond repair. Warranty SPAWN comes with a 12 month (from purchase date) back-to-base warranty, (i.e.