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Spectral Audio Neptune 2 Owner's Manual

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Summary of Contents for Spectral Audio Neptune 2

  • Page 1 Owner's Manual...

  • Page 2: Table Of Contents

    Contents Introduction ............................... 2 Environment care............................2 Neptune II ..............................2 Performance and Signals of Neptune II:....................3 Operating and safety instructions ......................4 Guarantee ..............................4 Operational and functional description...................... 5 The Neptune II Signal Flow: ......................6 Subtractive Synthesis (Theory)......................7 Initial Start-up............................

  • Page 3: Introduction

    We wish you much pleasure and many successful productions using the Neptune II! This manual has been produced with the greatest care. Spectral Audio is nevertheless unable to accept any responsibility for errors or omissions. Reproduction is permitted only with the consent of the manufacturer.

  • Page 4: Performance And Signals Of Neptune Ii

    Performance and Signals of Neptune II: Sawtooth at 250Hz: Sawtooth Spectrum: all three VCOs provide the same excellent signal quality Noise: 3DJH  ...

  • Page 5: Operating And Safety Instructions

    Noise Spectrum: 20Hz..20kHz Operating and safety instructions The instrument is intended only for the form of use described in this operating manual. It is to be used in dry rooms only. Do not allow any liquids to enter the instrument. Should this happen, the instrument requires cleaning by a specialist.

  • Page 6: Operational And Functional Description

    Operational and functional description The basic principle of the Neptune II corresponds to classic subtractive analog synthesis which incorporates interconnection between a VCO, VCF, VCA, envelope generators and LFO. To make the Neptune II suitable for MIDI, an additional MIDI to CV converter is added which converts the MIDI signals into analog control voltage signals.

  • Page 7: The Neptune Ii Signal Flow

    The Envelope Generator determines the chronological sequence of the volume after receiving a ‘note-on’ command. The MIDI to CV converter then issues a gate signal (+5V) starting the sequence of the envelope generator. The gate signal remains active at +5V until the ‘note-off' command comes, i.e., when the key is released: 7.1 The Neptune II Signal Flow: 3DJH  ...

  • Page 8: Subtractive Synthesis (Theory)

    7.2 Subtractive Synthesis (Theory) The VCOs produce very harmonic rectangular and sawtooth signals: Noise contains an endless number of frequencies. The frequency spectrum is subsequently limited by the filter: The setting of the resonance control is an important factor as it amplifies the frequencies around the cut-off frequency: Initial Start-up Connect the MIDI IN socket on the Neptune II to your MIDI controller (master keyboard, sequencer, etc.) via...

  • Page 9: Trouble-Shooting / Faq

    The Neptune II is also usable via MIDI if the CV / Gate switch on the rear side is on Out. The gate signal from the MIDI converter and the external signal are mixed internally. Trouble-shooting / FAQ 1. Does the power ON indicator light? - Equipment is not switched on or PSU is not plugged in - Power supply connection is faulty Continue point 2.

  • Page 10: Learn Mode

    10.2 Learn mode The Learn mode is accessed by pressing the LEARN switch. It is possible to return to normal mode by pressing it once again. The LEARN LED with flash when in Learn Mode. In this mode, the MIDI parameters such as reference note and MIDI channel are set.

  • Page 11: Filter Velocity Mode

    .pdf and .doc high res pictures Spectral Audio, Stockeristrasse 1, CH-6344 Meierskappel, Switzerland Email: spectralaudio@swissonline.ch http://www.spectralaudio.ch Copyright 2003 at Spectral Audio. All rights reserved. 3DJH  ...

  • Page 12: Midi Implementation Chart

    13 MIDI Implementation Chart Date: 7.12.02 Model: Spectral Audio Neptune II Version: 1.10 Function Transmitted Recognized Remarks Basic Channel 1-16 1-16 memorized Default Channel Default no modes supported Mode Messages Altered Note Number Starting with Ref Note True Voice Ref Note Range: 12..72...

  • Page 13: Technical Data Neptune Ii

    14 Technical Data Neptune II OSC1 range: 23 Hz .. 1.3 kHz used, theoretical 0.1 Hz..7 kHz OSC2 range: 11 Hz .. 5.3 kHz used, theoretical 0.1 Hz..7 kHz OSC3/LFO range: 0.14 Hz .. 1.35 kHz used, theoretical 0.1 Hz..7 kHz Tune range OSC1..OSC3: ±5 Halftones Slide time range:...
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