Leipzig TRUE analogue synthesizer Manuale utente
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Leipzig
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Contents
SPECIFICATION...........................................................................5
INTRODUCTION...........................................................................7
APPLICATIONS............................................................................7
SAFETY INSTRUCTIONS ............................................................8
CIRCUITS IN DETAILS.................................................................9
VCO & 2........................................................................................9
NOISE GENERATOR..................................................................10
MIXER.........................................................................................11
VCF .............................................................................................12
Filtering External Sound Sources............................................12
ENVELOPE GENERATORS.......................................................13
EG1/2 ASR..................................................................................13
VCA.............................................................................................14
LFO .............................................................................................14
MODULATION ............................................................................15
MIDI to CV CONVERTER...........................................................16
To Set MIDI Receive Channel ...................................................16
REAR PANEL .............................................................................17
REAR PANEL DETAILS .............................................................18
REAR PANEL AUDIO CONNECTIONS .....................................19
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SPECIFICATION
Brief Overview:
Leipzig is a self contained TRUE analogue synthesiser. The voice circuitry is entirely
analogue, using all discrete and op-amp components. There is no voice DSP.
Leipzig has a similar sound and specification to the classic Moog Prodigy / Rogue
synthesisers, but with many improvements such as MIDI and more modulation paths.
VCO1
Tune, Glide, PW , PWM, Mod Source &Amount controls, Saw out, Pulse out
VCO2
Tune, Glide , Sync, PWM, Mod Source &Amount controls, Saw out, Pulse out
VCF
Low pass filter: Cut-off, Emphasis, Key Track, ENV1 Mod, Mod Source & Amount
controls
Mixer
Audio source mixer, including external audio inputs
VCA
Mode switch, Output volume
ENV1
ASR envelope with trigger LED
ENV2
ASR envelope with trigger LED
LFO
Square & Triangle waves
Noise Generator
White noise
SUB oscillators
-1 from VCO1
-2 from VCO2
MIDI to CV Converter
16 bit high resolution with auxiliary controller CV2 output (modulation CV)
Many modulation possibilities.
Rotary controls:
25
Rotary switches:
6
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Push button:
1
LEDs:
6
Jack sockets (6.35mm, mono);
3
MIDI Sockets;
2
Rugged steel contruction
Dimensions:
Height: x 5U
Weight:
xKg
Power:
x
Accessories:
Manual
Mains adaptor (230v)
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INTRODUCTION
Congratulations on buying the Leipzig synthesiser. Leipzig is part of the Analogue
Solutions range of analogue music equipment. Leipzig is a precision electronic musical
instrument. It combines all the often needed music electronic circuitry to make a music
synthesiser in one compact module.
No compromise has been made with the construction of Leipzig. Cheaper options in
parts have not been used;
Full rugged steel case - no plastic mouldings
Good quality smooth potentiometers, fully sealed against dust
Good quality knobs with spun aluminium caps
High grade double sided lead free circuit board
All power and signal input/outputs have EM filters to remove external noise and im-
prove immunity
High Quality DAC for MIDI to CV conversion - 16bit!
Very stable MIDI to CV conversion
Very stable analogue oscillators
Expensive blue LEDs
Hand built by humans
Lasting quality and appeal with a life far longer than any software plug-in or DSP
synth
APPLICATIONS
MONOSYNTHESISER
Leipzig is for use any time you need analogue sound effects, fat basses, screaming
leads, beeps, tones, zaps, and all the other crazy sounds associated with analogue syn-
thesis. Use in place of your boring digital synths and DSP soft synths.
EFFECTS PROCESSOR
Leipzig has an audio input socket, so you can feed external sounds into the onboard
analogue filters for analogue processing.
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SAFETY INSTRUCTIONS
Please read carefully before using:
• Only use the correct power adaptor - 230V (or 115V whatever your country
needs)
• Never handle the adaptor with wet hands
• Never excessivly bend the adaptor cable or get it trapped or place heavy objects
on it. If the adaptor cable becomes damaged, replace the adaptor.
• Ensure the unit is disconnected from the mains before moving or cleaning.
• Always disconnect the unit from the mains if there is lightning in your area.
• Ensure the unit is on a stable surface, and never place heavy objects on top of it.
• Never allow young children or animals to operate the unit or adaptor.
• Do not use excessive force when using the controls or inserting cables to the con-
nectors.
• Theunitshould notbeoperated intherain ornearwater andshouldnot beexposed
to moisture. If the unit is brought from a cold environment to a warm one, the unit should
be left to reach the ambient temperature.
• Keep unit away from heat sources, such as radiators, ovens, heaters etc.
• Never allow the unit to get wet. Do not operate it near water, like pools, sinks, bath-
rooms etc. Do not place beverages on or near it.
• Never open the case or attempt to make repairs. Refer any servicing to a qualified
service personnel.
Preventing damage to other connected devices;
Leipzig has a very high dynamic range. It is capable of produce loud signals of very
high and sub-sonic frequencies that could blow inadequate speakers if played too loud. It
is recommended that input levels to external equipement (mixers, amp's etc.) is kept low
when first connected, and then sowly increased to a userable level.
Maintenance Instructions
Any cleaning of the the case should be done with a clean lint-free cloth. DO NOT
USE SOLVENTS OR CLEANERS, as this will deteriorate the exterior appearance of the
equipment.
Mounting
Mounting does not mean 'place on the wall' or 'to make love to' in this instance. Place
the unit soundly on any stable surface so he cannot fall off or over, causing it or yourself
injury.
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CIRCUITS IN DETAILS
Here follows details on all the sockets and controls, with brief simplified explanations
of what the circuits do. We have not gone into technical details on how and exactly what
each circuit does but tried to explain each control's function and effect.
Anyone who has used synthesisers before should be familiar with the terms used and
therefore be able to predict their behaviour and how they affect the sound. The best way
to learn how to use Leipzig is to go straight ahead and play with it. Reading of this manual
may only be neccessary for finer operational detail.
VCO & 2
The voltage controlled oscillators (VCOs 1 and 2) produce
the raw audio waveform usually used as the initial source for
sound creation. They provide cyclic audio waveforms that can
bepitched.VCOs usuallyreceivetreatment fromtheVCF to turn
their basic tones into pleasant sounds.
TUNE
Two independent TUNE controls for the oscillators. Controls the
course pitch of the VCO. Range is about +/- 2 octaves.
GLIDE
Two independentGLIDEcontrols (portamento) forthe oscil-
lators.Eachtime you play anewnote, the pitchwillglidefrom the
last note to the new note. The GLIDE control alters the speed.
At minimum there is no glide.
Pulse Width
(Just below VCO1 GLIDE control). For VCO1 only. This alters the pulse width for
VCO1's square wave (alters the 'duty cycle'). If you do not understand this, don't worry
about it! Just turn it and hear how the tone changes.
SYNC
VCO2 only. This switch routes a sync signal to VCO2. Oscillator sync is where a
master signal (selected by the switch) will reset the waveform of a slave signal (VCO2 in
this case) each time the master waveform starts a new cycle.
Try the different settings and listen to the effect. You may have to modulate the pitch
of either VCO1 or VCO2 to enhance the effect.There is a balancing act between the pitch
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of the two sound sources (usually the 2 VCOs) to get a good effect.
Sync source choices are;
VCO1 square wave
LFO square wave
EXTernal signal
Off (flat line symbol)
PWM
Two independent pulse width modulation controls (PWM), one for each VCO. This
allows modulation of the square wave 'duty cycle'. Once again, don't worry about this
technically, just enjoy the effect!.
Turn to the left for LFO triangle wave modulation.
Turn to the right for Envelope 2 modulation.
Centre is zero (no modulation).
For VCO1, it is best to first put the Pulse Width control to the centre before using
PWM, otherwise the sound might cut (unless that is the effect you want!)
NOISE GENERATOR
Thenoisegenerator produces whitenoise.Thisis like thehissyou hear betweenradio
stations. The signal is available for filtering via the EXT/NOISE mixer control.
Noise would be used for sound effects such as breath, wind, percussion, etc.
Indice
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