TECHNICAL DETAILS Neptune II

Feature:

  • 3 VCO with Range 0.14Hz .. 7kHz, used up to 5.3kHz
  • Sawtooth and Pulse Wave on OSC1 and OSC2
  • Sawtooth, Triangle, Pulse, Random on OSC3/LFO
  • OSC3 switchable as LFO
  • Noise Generator with Spectrum DC..100kHz
  • Octave Switch for OSC2 with range 32' .. 4'
  • Octave Switch for OSC3 with range 64' .. 8'
  • Slide
  • Sync of OSC2 to OSC1
  • External Signal source
  • True Ringmodulator
  • Mixer section
  • 24dB Cascade filter with Lowpass and Highpass
  • Self resonant
  • Keyfollow switch 0-50%-100%
  • Four Modulation targets of OSC3/LFO: Mixer, Cutoff, OSC1, OSC2
  • Six shapes of OSC3/LFO: Sawtooth, Triangle, Pulse, Random, Noise and OSC2 signal
  • Free run switch to have OSC3 free of the keyboard
  • Filter and Volume envelopes where Filter envelope can be positive or negative modulated
  • Distortion section with regular Distorter and Fuzzer
  • Volume
  • Power switch
  • Power on led

MIDI:
  • Learn switch for MIDI Channel and Reference note
  • Gate LED
  • Slide switchable over Controller
  • LFO MIDI Clock Sync
  • CV and Gate In/Out
  • 5 Octave Range precise MIDI to CV Converter
  • interpret Pitch bend and Sustain
  • Cutoff and Modulation Controller with MSB and LSB
  • Pitchbend Range over Controller
  • MIDI Timing Clock 1/1 note up to 1/32 note
  • MIDI Thru with signal regeneration

Performance:
  • Quality smooth potentiometer
  • Soft touch knobs
  • High efficiency 5mm leds, three green/one blue
  • 2.2mm travel push switches for optimal optical feedback
  • Anodized colored 3mm Front Panel
  • Pure DC Design means no capacitors in the signal flow
  • Low noise design
  • True noise generator (not digital noise)

Additional manual change possibilities (described in the Service manual) :
  • Having PW(M) on Square Wave on Osc1,2 or 3
  • Osc3 Sync with Osc1 or Osc2
  • Even faster Envelopes
  • Increase tune range for Osc1..Osc3
  • Additional signal inputs and outputs (i.e. to work with your modular system i.e.)
  • General in/outputs of Oscillators, Envelopes, Filter, Ringmodulator, ...



Performance and Signals of Neptune Mk2
Saw 250 Hz
Saw Spectrum
Noise Signal
Noise Spectrum 10Hz..50kHz