User Manual
NEUTRON
Paraphonic Analog and Semi-Modular Synthesizer with Dual 3340 VCOs,
Multi-Mode VCF, 2 ADSRs, BBD Delay and Overdrive Circuit in a Eurorack Format
2 NEUTRON User Manual
Table of Contents
Thank you .......................................................................2
Important Safety Instructions ...................................... 3
Legal Disclaimer ............................................................. 3
Limited warranty ............................................................ 3
About the Neutron ......................................................... 4
1. Introduction ............................................................... 5
2. Features ...................................................................... 5
3. Controls ...................................................................... 6
4. Overview ..................................................................10
5. User Congurable Options & Features .................. 13
6. Eurorack Installation ............................................... 18
7. Software Update & Calibration .............................. 19
8. Patch Bay .................................................................. 21
9. Neutron Set-up Examples ...................................... 22
10. Preset Patches ....................................................... 24
11. Troubleshooting ....................................................24
12. Specications ......................................................... 25
13. Appendix A .............................................................27
15. Appendix B Neutron App ...................................... 29
16. Glossary .................................................................. 30
Thank you
Thank you very much for expressing your condence in Behringer by purchasing
the Neutron analog synthesizer - with 2 x 3340 VCOs, analog bucket brigade
delay (BBD), soft-clipping overdrive circuit, 5 shape morphing LFO,
12 dB multi-mode 2 pole lter, paraphonic mode, semi-modular
and Eurorack format
3 NEUTRON User Manual
9. Do not defeat the safety purpose of the polarized
20. Please keep the environmental aspects of battery
Important Safety Instructions
Terminals marked with this symbol carry
electrical current of sucient magnitude
to constitute risk of electric shock.
Use only high-quality professional speaker cables with
¼" TS or twist-locking plugs pre-installed. Allother
installation or modication should be performed only
by qualiedpersonnel.
This symbol, wherever it appears,
alertsyou to the presence of uninsulated
dangerous voltage inside the
enclosure-voltage that may be sucient to constitute a
risk ofshock.
This symbol, wherever it appears,
alertsyou to important operating and
maintenance instructions in the
accompanying literature. Please read the manual.
Caution
To reduce the risk of electric shock, donot
remove the top cover (or the rear section).
No user serviceable parts inside. Refer servicing to
qualied personnel.
Caution
To reduce the risk of re or electric shock,
do not expose this appliance to rain and
moisture. The apparatus shall not be exposed to dripping
or splashing liquids and no objects lled with liquids,
suchas vases, shall be placed on the apparatus.
Caution
These service instructions are for use
by qualied service personnel only.
Toreduce the risk of electric shock do not perform any
servicing other than that contained in the operation
instructions. Repairs have to be performed by qualied
servicepersonnel.
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with dry cloth.
7. Do not block any ventilation openings. Install in
accordance with the manufacturer’s instructions.
8. Do not install near any heat sources such as
radiators, heat registers, stoves, or other apparatus
(including ampliers) that produce heat.
or grounding-type plug. A polarized plug has two blades
with one wider than the other. A grounding-type plug
has two blades and a third grounding prong. The wide
blade or the third prong are provided for your safety. Ifthe
provided plug does not t into your outlet, consult an
electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or
pinched particularly at plugs, convenience receptacles,
and the point where they exit from the apparatus.
11. Use only attachments/accessories specied by
themanufacturer.
12. Use only with the
cart, stand, tripod, bracket,
or table specied by the
manufacturer, orsold with
the apparatus. When a cart
is used, use caution when
moving the cart/apparatus
combination to avoid
injury from tip-over.
13. Unplug this apparatus during lightning storms or
when unused for long periods of time.
14. Refer all servicing to qualied service personnel.
Servicing is required when the apparatus has been
damaged in any way, such as power supply cord or plug
is damaged, liquid has been spilled or objects have fallen
into the apparatus, the apparatus has been exposed
to rain or moisture, does not operate normally, or has
beendropped.
15. The apparatus shall be connected to a MAINS socket
outlet with a protective earthing connection.
16. Where the MAINS plug or an appliance coupler is
used as the disconnect device, the disconnect device shall
remain readily operable.
17. Correct disposal of this
product: This symbol indicates that
this product must not be disposed
of with household waste,
according to the WEEE Directive
(2012/19/EU) and your national
law. This product should be taken
to a collection center licensed for the recycling of waste
electrical and electronic equipment (EEE). The
mishandling of this type of waste could have a possible
negative impact on the environment and human health
due to potentially hazardous substances that are generally
associated with EEE. At the same time, your cooperation
in the correct disposal of this product will contribute to
the ecient use of natural resources. For more
information about where you can take your waste
equipment for recycling, please contact your local city
oce, or your household waste collection service.
18. Do not install in a conned space, such as a book
case or similar unit.
19. Do not place naked ame sources, such as lighted
candles, on the apparatus.
disposal in mind. Batteries must be disposed-of at a
battery collection point.
21. Use this apparatus in tropical and/or
moderate climates.
LEGAL DISCLAIMER
Music Tribe accepts no liability for any loss which
may be suered by any person who relies either
wholly or in part upon any description, photograph,
or statement contained herein. Technical specications,
appearances and other information are subject to
change without notice. All trademarks are the property
of their respective owners. Midas, Klark Teknik,
Lab Gruppen, Lake, Tannoy, Turbosound, TC Electronic,
TC Helicon, Behringer, Bugera and Coolaudio are
trademarks or registered trademarks of Music Tribe
Global Brands Ltd. © Music Tribe Global Brands Ltd.
2018 All rights reserved.
LIMITED WARRANTY
For the applicable warranty terms and conditions
and additional information regarding Music Tribe’s
Limited Warranty, please see complete details online at
musictribe.com/warranty.
Zhongshan Eurotec Electronics Limited
No. 10 Wanmei Road, South China Modern Chinese
Medicine Park, Nanlang Town, 528451, Zhongshan City,
Guangdong Province, China
4 NEUTRON User Manual
About the Neutron
• Paraphonic, dual analog VCO design which allows for ingenious
music creation.
• Semi-modular design requires no patching for immediate performance.
• Dual 3340 VCOs authentically recreate the classic sound creation.
• 32 in/24 out jack patch bay for sound patching experimentation.
• 5 variable oscillator shapes with pulse width modulation for high
quality sounds.
• Blend or switch the OSC & LFO shape. A unique sound creation tool.
• Paraphonic mode allows both oscillators to be independently controlled.
• Audio-rate LFO with 5 waveform shapes, key sync, delay and MIDI sync.
• 2 assignable ADSR generators for modulation of VCF, VCA etc.
• 8192 stage Delay based on legendar y BBD (Bucket Brigade Delay) technology.
• Overdrive circuit adds grit and edge to your sound.
• Complete Eurorack solution – main module can be transferred to a standard
Eurorack case.
• 36 knobs and 7 buttons give you direct and real-time access to all
important parameters.
• Powerful 12 dB multi-mode 2 pole lter with three types, Low-pass,
Band-pass and High-pass.
• Assignable Sample and Hold with Glide for added creativity.
• Slew Rate Limiter for amazing glissando sound eects.
• White noise generator dramatically expands soundscape creation.
• Pure analog signal path based on legendary VCO designs.
• External audio input for processing external sound sources.
• Servo balanced mono output for the highest signal integrity.
• 3-Year Warranty Program*.
• Designed and engineered in the U.K.
*Warranty details can be found at www.musictribe.com
5 NEUTRON User Manual
1. Introduction
An ultra-aordable leap into the warm world of analog synthesis, the Behringer
Neutron gives you the power to create virtually any monophonic sound
imaginable with incredible power and ease.
The pure analog signal path is based on the legendary V3340 VCO chip with
variable oscillator and LFO shapes which can be blended or switched for unique
sound creation. For protection and convenience, the Neutron can even be
mounted in a standard Eurorack, making it ideal for the studio and/or the road.
Owning a Neutron gives you all the power of a monster modular synthesis system
in a exible package with the ability to create bewildering, complex sounds.
1.1 Before you get started
The Neutron was carefully packed in the factory to guarantee safe transport.
Nevertheless, we recommend that you carefully examine the packaging and
its contents for any signs of physical damage, which may have occurred during
transit. If the unit is damaged, please do NOT return it to us, but notif y your
dealer and the shipping company immediately, otherwise claims for damage or
replacement may not be granted.
1.1.1 Initial operation
Be sure that there is enough space around the unit for cooling purposes and, to
avoid over-heating, please do not place the Neutron on high temperature devices
such as radiators or power amps.
WARNING: The Neutron is supplied with a DC power adapter. It meets the
required safety standards. Do not use any other power adapter.
WARNING: Please make sure that all units have a proper ground connection. For
your own safety, never remove or disable the ground conductor from any units or
AC power cords in your system.
Innovative Multi Mode Filter
The very heart of the sound of the Neutron is its highly-exible 12 dB 2-pole
lter, which lets you freely experiment with the cuto frequency and resonance
to create out-of-this-world soundscapes. Neutron’s Filter Mode button toggles
between LFP, BPF and HPF. You can also adjust the at tack, decay, release
and sustain controls to aect the cuto frequency with time. A second lter
output allows further audio contortion with its own dedicated output from the
patch bay.
Distorted Reality
The VCA passes through the powerful sof t clipping overdrive circuit which can
add punch and bite to your creations. This section also features a diverse tone
control to further expand your creative palette.
Oscillator and LFO morphing
The exquisite ability to blend or morph the oscillator and LFO shape lets new
adventures in tone creation begin. By modulating these waveforms, psychedelic
sounds can be cooked up comparable to other synthesizers.
Poly Chain Ready
While it is largely a monophonic instrument (one note at a time) the Poly Chain
function lets you combine multiple Neutron synthesizers for polyphonic sounds.
Bucket Brigade Delay
The Neutron has an impressive analog bucket brigade delay section. Gone is
the cold digital delay chip found in most modern synthesizers and replaced
by a warm analog design. Eects from long dub delays to ex treme chorusing
can be created.
1.2 The product manual
This product manual is designed to give you both an overview of the Neutron, as
well as detailed information on each of the controls and parameters. The manual
is based on the sof tware release, V2.0.0. The Neutron software must be updated
to at least V2.0.0 in order to use the new features and Neutron App. You will nd
an overview of the physical control elements in the nex t chapter.
1.3 Preparation
CAUTION: Remember to turn your monitors/loudspeakers on last when powering
up your system. Turn your monitors/loudspeakers o rst when powering down
your system.
2. Features
A Past Classic Reincarnated
Great care has been taken in designing the Neutron to achieve new possibilities
in sound creation by reviving a legacy VCO chip from classic synths of yesteryear.
By creating a fresh modern take on a semi-modular synth, the Neutron gives you
the power to harness the prodigious sound of the V3340 chip. Colossal bass tones
through to screaming lead sounds can be achieved to take your sound conception
to the next level.
Paraphonic Performance
Paraphonic mode allows the two oscillators to be independently pitched when
more than one MIDI note is played. This gives tremendous tonal qualities by
hearing two pitches which can evolve and interplay with each other.
Semi-Modular Design
Designed around an elegantly clean, calculated work stream. The Neutron
benets greatly from its semi-modular design, which requires no patching for
quick operation. Just connect your keyboard or computer via MIDI or USB and
start exploring the versatile world of analog music synthesis.
Eurorack Ready
Designed to handle the rigors of life on the road or in the studio, your Neutron
can easily be transferred into a standard Eurorack case for the perfect integration
into your existing system.
Controls and Connectivity
The Neutron has 36 knobs and 7 buttons, all laid out in a highly-intuitive format
that puts the fun back into your music creation. Input and output connections
include: Audio input, MIDI I/O and thru over USB/MIDI DIN plus a full 32 input, 24
output patch bay for countless experiments into the world of modular synthesis.
You Are Covered
We always strive to provide the best possible customer experience. Our products
are made in our own MUSIC Tribe factory using state-of-the-ar t automation,
enhanced production workows and quality assurance labs with the most
sophisticated test equipment available in the world. As a result, we have one of
the lowest product failure rates in the industr y, and we condently back it up
with a generous Warranty program.
6 NEUTRON User Manual
3. Controls
3.1 Top Controls
(1)
(2) (3)
(19)
(12)(13)
(20)
(24) (25)(23)(18)
(5)
(4)
(6)
(7)
(8) (9)
(10) (11)
(45) (46) (47) (48)
(49) (50) (51) (52)
(53) (54) (55) (56)
(57) (58) (59) (60)
(61) (62) (63) (64)
(65) (66) (67) (68)
(69) (70) (71) (72)
(73) (74) (75) (76)
(14)
(15)
(16)
(17)
(21)
(22)
(77) (78) (79)
(80) (81) (82)
(83) (84) (85)
(86) (87) (88)
(89) (90) (91)
(92) (93) (94)
(95) (96) (97)
(98) (99) (100)
(37)
(38)
(26)
(27)
(28)
(39)
(40)
(29)
(32)
(41)
(42)
(31)
(30)
(43)
(44)
(36)(35)(34)(33)
(101) (102) (103) (104) (105) (106) (107) (108)(109)
7 NEUTRON User Manual
3.1.1 Oscillator Section VCO (Voltage Controlled
Oscillator)
(1)
(2) (3)
(5)
(4)
(6)
(7)
(8) (9)
(10) (11)
(1) and (3) OSC TUNE - Adjusts the frequency of the oscillators.
(2) OSC MIX - Adjusts the blend between oscillator 1 and 2.
(4) and (5) OSC SHAPE - Adjusts the shape of the oscillator. Can be congured
to switch between xed waveforms or to blend continuously between
adjacent waveforms.
(6) and (7) OSC RANGE - Adjusts the pipe length of oscillators between
32/16/8. +/-10 octave mode enabled when all 3 LEDs are on.
(8) OSC SYNC - OSC 1 will restart the period of OSC 2, so that they will have the
same base frequency.
3.1.3 LFO Section (Low Frequency Oscillator)
(20)(18) (19)
(18) SHAPE - Adjusts the shape of the LFO with the ability to blend between
waveforms.
(19) RATE - Adjusts the speed of the selected LFO waveform.
(20) KEY SYNC - Re-trigger the LFO phase with each new MIDI note.
3.1.4 Noise & VCA Bias
(21)
(22)
(21) NOISE LEVEL - Adjusts the amount of white noise injected into the lter.
(22) VCA BIAS - Opens or closes the VCA.
3.1.5 Delay Section
(9) PARAPHONIC - Allows the two oscillators to be independently pitched
when more than one MIDI note is played. If only one note is received, both
oscillators will play the same pitch.
(10) and (11) PULSE WIDTH (PW)- Sets the pulse width of oscillator pulse/tone
mod waveforms.
3.1.2 VCF Section (Voltage Controlled Filter)
(12)(13)
(14)
(15)
(16)
(17)
(12) FREQ - Adjusts the cuto frequency of the VCF.
(13) MODE - Selects the lter type. Choose between High Pass Filter (HPF), Band
Pass Filter (BPF) and Low Pass Filter (LPF).
(14) RESO - Adjusts the resonance of the lter.
(15) KEY TRK - Applies keyboard tracking to the VCF.
(16) MOD DEPTH - Sets the depth of lter modulation from the FREQ MOD input.
(17) ENV DEPTH - Sets the depth of lter modulation from ENVELOPE 2.
(24) (25)(23)
(23) TIME - Controls the rate of the delay. When the time control is fully to the
right, the longest delay time is set.
(24) REPEATS - Controls the number of repeats or echoes.
(25) MIX - Adjusts the wet/dry mix. When the mix control is turned fully to the
left, no eect will be heard. Turning the mix control fully to the right will
give you the delayed wet signal only. With the repeat control fully to the
right, repeats will be innite and keep building.
3.1.6 Overdrive Section
(26)
(27)
(28)
(26) DRIVE - Sets the amount of overdrive. The drive control can be used to add
subtle overdrive through to wild all-out distortion. Turn to the left for gentle
warming or turn to the right for more aggression and bite.
(27) TONE - Changes the timbre of the overdriven sound. Turning the tone to
the left boosts the lows to create rich warm sounds. Turning to the right
gradually thins out the low end and starts to boost the highs to create sharp
cutting sounds.
(28) LEVEL - Controls the volume of the overdrive output. When fully o you may
hear no audio at the output.
8 NEUTRON User Manual
(77) (78) (79)
(80) (81) (82)
(83) (84) (85)
(86) (87) (88)
(89) (90) (91)
(92) (93) (94)
(95) (96) (97)
(98) (99) (100)
3.1.7 Envelope Section
Envelope 1
Envelope 1 is routed to the VCA CV by default.
(29)
(32)
(31)
(30)
(36)(35)(34)(33)
(29) A [Attack] - Controls the attack time of the envelope.
(30) D [Decay] - Controls the decay time of the envelope.
(31) S [Sustain] - Controls the sustain level of the envelope.
(32) R [Release] - Controls the release time of the envelope.
Envelope 2
Envelope 2 is routed to the VCF lter cuto via ENV DEPTH control by default. See
17. ADSR knobs 33-36 function the same as 29-32.
3.1.8 Output Section
(43) ATTENUATOR 1 - Used to reduce the amplitude of the input signal. ATT1 can
be controlled by a control voltage. See 58.
(44) ATTENUATOR 2 - Passive attenuator, reduces the amplitude of a signal.
Normalized patching routes the LFO to the oscillator Pulse Width inputs to
provide a Pulse Width Modulation (PWM).
3. 2.1 Patch Bay
Input Patch Bay Section
(45) (46) (47) (48)
(49) (50) (51) (52)
(53) (54) (55) (56)
(57) (58) (59) (60)
(61) (62) (63) (64)
(65) (66) (67) (68)
(69) (70) (71) (72)
(73) (74) (75) (76)
(45) OSC 1 – OSC 1 pitch CV.
(46) OSC 2 – OSC 2 pitch CV.
(47) OSC1+2 – OSC 1 and 2 pitch CV.
(37)
(39)
(37) VOLUME - Controls the output level of the synthesizer. The headphone
output is independent of the volume control and has its own control on the
back of the synthesizer.
(38) MIDI IN - Accepts incoming MIDI data from the selected MIDI channel.
3.1.9 Sample & Hold
Generates a random pattern based on the sample and hold clock.
(39) RATE - Controls the rate of the sample and hold clock.
(40) GLIDE - Sets the rate of change between sample values.
(38)
(40)
3.2 Slew Rate Limiter & Attenuator Section
(41)
(43)
(42)
(44)
(48) INVERT IN – The input signal is inverted at INVERT OUT. See 88.
(49) SHAPE 1 – OSC 1 Shape CV.
(50) SHAPE 2 – OSC 2 Shape CV.
(51) PW1 – OSC 1 PW CV.
(52) PW2 – OSC 2 PW CV.
(53) VCF – VCF signal input.
(54) FREQ MOD – VCF cuto frequency CV.
(55) RES – VCF resonance CV.
(56) OD IN – Overdrive signal input.
(57) VCA IN – VCA signal input.
(58) VCA CV – VCA CV.
(59) DELAY IN – Delay signal input.
(60) DELAY TIME – Delay time CV.
(61) E. GATE1 – Envelope 1 gate.
(62) E. GATE2 – Envelope 2 gate.
(63) S&H IN – Sample and Hold signal input.
(64) S&H CLOCK – Sample and Hold clock input.
(65) LFO RATE – LFO Rate CV.
(41) SLEW - The Slew Limiter is used to limit the rate of change in a signal. This
function is sometimes referred to as 'Glide', 'Glissando', 'Lag Processing', or
'Portamento'. The amount of limitation is set by this control.
(42) PORTA TIME - Controls the rate of change between MIDI notes. The eect is
o when turned fully left and increases when turned to the right.
(66) LFO SHAPE – LFO Shape CV.
(67) LFO TRIG – LFO Trigger input.
(68) MULT – MULT signal input. See 92/93.
(69) AT T1 IN – Attenuator 1 signal input.
(70) AT T1 CV – Attenuator 1 CV.
9 NEUTRON User Manual
(71) ATT2 IN – Attenuator 2 signal input.
(72) SLEW IN – Slew signal input.
(73) SUM1(A) – SUM 1 rst signal input. See 98.
(74) SUM1(B) – SUM1 second signal input. See 98.
(75) SUM2(A) – SUM 2 rst signal input. See 99.
(76) SUM2(B) – SUM 2 second signal input. See 99.
Output Patch Bay Section
(77) (78) (79)
(80) (81) (82)
(83) (84) (85)
(86) (87) (88)
(89) (90) (91)
(92) (93) (94)
(95) (96) (97)
(98) (99) (100)
(77) OSC 1 – Output of Oscillator 1.
(78) OSC 2 – Output of Oscillator 2.
3.2.2 Rear Panel
(101) (102) (103) (104) (105) (106) (107) (108)(109)
(101) INPUT – Mono unbalanced audio input using a ¼" (6.35 mm) jack cable for
processing external sound sources.
(102) OUTPUT – Connect to a mixer or audio interface using a ¼" (6.35 mm) mono
jack cable. Remember to turn your monitors/loudspeakers on last when
turning on your system and turn your monitors/loudspeakers o rst when
turning your system o.
(103) PHONES – ¼" (6.35 mm) jack connection to plug headphones in.
(104) PHONES LEVEL – Ensure the volume control is at minimum when putting
on headphones or when turning the synthesizer on or o.
(105) MIDI CHANNEL SELECTION.
Move the four dip switches to select the incoming MIDI channel for
the synthesizer.
(79) OSC Mix – Output of OSC 1/2 mix.
(80) VCF 1 – Main output of the lter.
(81) VCF 2 – Alternate output of the lter.
(82) OVERDRIVE – Overdrive output signal.
(83) VCA – Voltage Controlled Amplier output signal.
(84) OUTPUT – Main output signal, post delay.
(85) NOISE – Output of the white noise generator.
(86) ENV1 – Envelope 1 output.
(87) ENV2 – Envelope 2 output.
(88) INVERT – Inverted version of signal applied to INVERT IN. See 48.
(89) LFO – Output of the Bipolar LFO (-5 V to +5 V).
(90) LFO UNI – Output of the Unipolar LFO (0V to +5 V).
(91) S&H – Sample and Hold output signal.
(92) MULT 1 – Duplicate of signal applied to MULT IN. See 68.
(93) MULT 2 – Duplicate of signal applied to MULT IN. See 68.
(94) M IDI GATE – MIDI gate output.
(95) AT T1 – Output of Attenuator 1.
(96) AT T2 – Output of Attenuator 2.
(97) SLEW – Output of Slew.
(98) SUM1 – Summation of SUM 1(A+B).
(99) SUM2 – Summation of SUM 2(A+B).
MIDI CHANNEL DIP SWITCH SETTINGS
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
(106) MIDI THRU – The 5-pin MIDI DIN connector is used to pass through MIDI
data received at the MIDI INPUT.
(107) USB PORT – Connects to a computer via standard USB cable. The Neutron
will display in your DAW as a class-compliant USB MIDI device, capable of
sending and receiving MIDI information.
(108) POWER SWITCH – Turns the synthesizer on and o. Make all audio
connections before powering on.
(100) ASSIGN – Assignable output. See User Congurable Options & Features.
(109) POWER INPUT – Connect the supplied power supply only.
10 NEUTRON User Manual
4. Overview
This overview will help you set up the Neutron analog synthesizer and briey
introduce its capabilities.
4.1 Connection
The Neutron has a ¼" (6.35 mm) mono jack output on the rear of the unit which
is also duplicated on the patch bay via a 3.5 mm output. Audio input is via a ¼"
(6.35 mm) mono jack on the rear panel. Please consult the connection set-up
guide for examples (8.1).
Caution: Do not overload the 3.5 mm inputs. They can only accept the correc t
level of voltages as shown in the specication tables later in this manual. The
3.5 mm outputs should only be connected to inputs capable of receiving the
output voltages. Failure to follow these instructions may damage the Neutron or
external units.
4.2 Software Setup
The Neutron is a USB Class Compliant MIDI device, and so no driver installation
is required. The Neutron does not require any additional drivers to work with
Windows and MacOS.
4.3 Hardware Setup
Make all the connections in your system. Use the rear panel MIDI switches to
set the Neutron to a unique MIDI channel in your system. Connect an external
keyboard with MIDI output directly to the Neutron MIDI IN 5-pin DIN type input
or via MIDI over USB. Apply power to the Neutron using the supplied power
adapter only. Ensure your sound system is turned down. Turn on the Neutron rear
panel power switch.
4.4 Oscillator Section
(1)
(2) (3)
You can adjust the SHAPE control for each oscillator to select dierent
waveforms, if in blend mode, the waveforms will morph into one another in a
smooth transition.
The ve oscillator shapes are:
Tone Mod
Square/Pulse
Sawtooth
Triangle
Sine
The P. WIDTH aects the rst two wave shapes, TONE MOD and SQUARE WAVE.
When OSC SYNC is engaged, oscillator 1 tracks the MIDI note and provides a
reference to reset the period of oscillator 2.
When the PARAPHONIC switch is engaged, it allows the two oscillators to be
independently pitched when more than one MIDI note is played simultaneously.
If only one note is played, both oscillators will be driven at the same pitch.
The NOISE control injects white noise into the lter, which can be used to add
another texture to the sound. Noise can be used to create percussive sounds
when used with short VCA envelope settings.
VCA Bias is used to control the VCA. It allows the user to 'open' the VCA without
triggering the envelope (e.g. with a MIDI note), allowing audio to
sound continuously.
(5)
(4)
(6)
(7)
(8) (9)
(10) (11)
Each oscillator has a tune control which gives approximately +/-1 octave range
in 8/16/32 modes or a range from 0.7 Hz to over 50 kHz when all range LEDs are
illuminated which is around +/-10 octaves.
The OSC MIX control is used to blend between the two oscillators to create rich
harmonic sounds.
(21)
(22)
11 NEUTRON User Manual
4.5 Filter Section
The Neutron has a powerful 12 dB lter with three modes available:
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High Pass Filter (HPF)
Band Pass Filter (BPF)
Low Pass Filter (LPF)
The mode button steps through each lter mode.
The FREQ control sets the lter cuto frequency. The RESO control adjusts the
resonance of the lter. When the resonance control is set to at, or close to,
maximum the VCF will become self-resonant and produce a sine wave tuned to
the cuto frequency of the lter. This tone can be used in sound creation and
played in tune with the oscillators by activating KEY TRACK and tuning the VCF
using the FREQ control.
By default, the LFO is patched through the FILTER DEPTH control. This enables
modulation of the lter frequency using the LFO. The VCF has a second output
which is accessible from the patch bay (VCF 2). VCF 2 mode is determined by the
select VCF mode. The relationship is:
Mode =
Mode =
, VCF2 =
, VCF2 =
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(15)
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4.6 LFO Section
The Neutron LFO has a frequency range of 0.01 Hz to 10 kHz. This allows low
frequency modulation up to audio rate modulation using the LFO.
The Shape control sets the type of LFO waveform. When selecting the LFO
waveform, the control can be set to select bet ween xed types or to blend
between wave shapes. The ve LFO shapes are:
Sine
Triangle
Sawtooth
Square
Reverse Sawtooth
With KEY SYNC engaged, the LFO is re-triggered when a MIDI note is received.
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Mode =
This allows for additional lter modes. For example, a notch lter can be created
when the lter mode is set to by summing VCF 1 and VCF 2, then patching the
summed output into OD IN.
KEY TRACK applies keyboard tracking to the VCF.
This sets the lter cuto frequency based on the latest MIDI note received. The
base cuto frequency is set using the FREQ control with MIDI notes increasing the
cuto frequency relative to the note being played. Additionally, this allows the
lter to be played like an oscillator when the resonance control is turned up.
, VCF2 =
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