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Leipzig-S/SK User Manual

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VCA – VOLTAGE CONTROLLED AMPLIFIER | Analogue Solutions

VCA – VOLTAGE CONTROLLED AMPLIFIER

The VCA is an amplifier whose gain can be changed with a modulation signal, typically
an envelope.

There are four choices available on the rotary switch.

MODE

EG1 /EG2

Normally used to contour the volume.

GATE

The VCA opens and closes with no gradual attack or decay, much like an organ.

THRU

This holds the VCA open at full volume. This is typically used when feeding external
audio into the synth. It can then be used like an effects processor.

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Содержание LEIPZIG-S

Страница 1: ...Leipzig S SK User Manual Analogue Solutions Welcome 1 Leipzig S SK u s e r m a n u a l...

Страница 2: ...E CONTROLLED LOW PASS FILTER 17 LFO LOW FREQUENCY MODULATION 18 MODULATION 19 VCO1 19 VCO2 20 VCF 21 EG1 EG2 ENEVELOPE GENERATORS 22 VCA VOLTAGE CONTROLLED AMPLIFIER 24 MODE 24 MIDI 26 PROGRAM rack ve...

Страница 3: ...S SK User Manual Analogue Solutions Welcome 3 USING THE SEQUENCER AS AN AUDIO OSCILLATOR 33 Specification 35 LEIPZIG Sk Pitch Bend and Mod Wheel 37 LEIPZIG SK Rear Panel Audio Connections 38 CV Gate J...

Страница 4: ...more than one signal to a destination There are many modulation choices on the rotary select switches All signal choices have been carefully chosen Leipzig was designed by a musician of electronic mu...

Страница 5: ...r 24db Octave 4 pole 2 VCOs with Glide Sub VCOs for extra depth and power Osc Sync Cross Mod Plenty of modulation routing possibilities Analogue step sequencer with plenty of clocking options Use sequ...

Страница 6: ...ue synth tutorials and forums are always a good place to ask question about general synth use POWER Leipzig S comes with a power supply It uses a power supply with an AC output not DC If your power su...

Страница 7: ...ables could cause a malfunction or a shock or fire hazard Do not allow any small parts like pins coins liquids flammable material to enter the unit Immediately disconnect the mains supply and adaptor...

Страница 8: ...adaptor or any cables with wet or moist hands Before cleaning the unit disconnect from the mains Whenever you suspect lightning in the area disconnect the AC adaptor Did you read all this Good now yo...

Страница 9: ...ed with water To remove stubborn dirt use a cloth impregnated with a mild non abrasive detergent Afterwards be sure to wipe the unit dry thoroughly with a dry cloth Be sure to disconnect the AC adapto...

Страница 10: ...ns adaptor to the rear Rotate the SEQ SYNC rotary switch in the lower left corner to LFO to start the sequencer Slowly increase the level on your mixer to a suitable level Note you will have to adjust...

Страница 11: ...Manual Analogue Solutions Vco Voltage control oscillators 11 TOUR OF THE CONTROLS VCO VOLTAGE CONTROL OSCILLATORS The two VCOs are almost identical but VCO1 has a manual pulse width control and VCO2 h...

Страница 12: ...But also the MODULATION AMOUNT controls will affect tuning the VCO2 MIDI PITCH switch and also the positions of the sequencer s VCO1 2 DESTINATION amount controls In normal use turn the sequencer DEST...

Страница 13: ...This allows modulation of the Pulse Width of the square wave It can be modulated by the LFO Triangle wave when turned left or by Envelope1 when turned right Centre position is off no modulation VCO2...

Страница 14: ...VCO1 For an extreme sound modulate the pitch of VCO2 You may need to play around with the pitches of VCO1 and VCO2 to find a setting that works best PULSE WIDTH MODULATON This allows modulation of th...

Страница 15: ...e audio is mixed with the mixer before being fed to the input of the filter Each control can choose between two signals Centre is zero volume As you gradually turn the control left or right you increa...

Страница 16: ...audio from the VCOs This is normal Set it to Noise or put to the centre if the Sequencer signal is not to be used as an audio signal Clock the sequencer at audio frequencies then the sequencer output...

Страница 17: ...l of VCO1 Square waveform VCO2 Left changes the level of VCO2 Sawtooth waveform RIght changes the level of VCO2 Square waveform VC LPF VOLTAGE CONTROLLED LOW PASS FILTER The Leipzig has a 24db octave...

Страница 18: ...es pitch CV to the filter cutoff When it is turned up as you play higher up the keyboard the filter will open up This makes the sound get brighter as you play up the keyboard EG MODULATION This contro...

Страница 19: ...LFO MODULATION This section selects and routes various modulation signals to the VCO and VCF circuits The three rotary switches select the modulation source for example LFO or EG The Level control se...

Страница 20: ...UARE Ideal for special effects EG1 Pitch sweeps Extreme settings are good for percussion VCO2 SQUARE Extreme settings create Ring mod and metallic type sounds VCO2 LFO TRIANGLE Ideal for vibrato effec...

Страница 21: ...controller controls pitch VCF LFO TRIANGLE Ideal for wah wah effects LFO SQUARE Ideal for special effects VCO1 Use with fill Resonance for metallic type sounds MIDI Control from auxiliary CV MIDI con...

Страница 22: ...Typically used to change the volume or filter cutoff though they can also be used to modulate the VCO pulse widths or pitch Both envelopes are identical so only one will be described ATTACK This cont...

Страница 23: ...ximation of output level MIDI TRIG SWITCH The EGs can be triggered from MIDI or the sequencer When this switch is down it can be triggered from MIDI See more notes about this in the section about sequ...

Страница 24: ...ation signal typically an envelope There are four choices available on the rotary switch MODE EG1 EG2 Normally used to contour the volume GATE The VCA opens and closes with no gradual attack or decay...

Страница 25: ...Leipzig S SK User Manual Analogue Solutions VCA VOLTAGE CONTROLLED AMPLIFIER 25...

Страница 26: ...is a modulation CV It is controlled by either MIDI velocity or a MIDI Controller PROGRAM RACK VERSION ONLY This button is used to set the MIDI channel and CV2 controller Works best if you plug a MIDI...

Страница 27: ...Telemarks TO CONNECT THEM UP Set the Slave Leipzig S to MIDI channel 2 Connect your keyboard to the MIDI In of the Master Leipzig S Connect the MIDI Thru from the Master Leipzig S to the MIDI In of th...

Страница 28: ...enerator and then used as a new audio source that can be played and filtered Note it does not produce a MIDI output This is an anague synth after all Think of this sequencer more as a modulation sourc...

Страница 29: ...ox 2V the sequencer steps MIDI SYNC ON LEIPZIG SK THIS IS EXT2 The sequencer will run when it received MIDI Sync It responds to Start and Stop messages too NOTE ABOUT HOW SYNC CHOICE AFFECTS EG Differ...

Страница 30: ...the notes do not overlap The note number of the MIDI notes will affect the pitch as usual Ideal for transposing the Leipzig s analogue sequencer ADVANTAGES You can use your MIDI Sequencer s Mute to s...

Страница 31: ...Leipzig S SK User Manual Analogue Solutions SEQUENCER 31 The step button allows you to manually step the sequencer...

Страница 32: ...el can be changed using the appropriate control You must tune the VCO1 and VCO2 mod level pots by ear so that both VCOs are playing in unison However by adjusting them differently you can make them se...

Страница 33: ...o this without the MIDI keyboard re triggering the envelopes You just want the sequencer to deal with triggering SEQUENCER TRIGGERING ONLY If you just want the Sequencer to play Leipzig then Turn both...

Страница 34: ...ve the toggle switch to SEQ to route the output of the sequencer to the mixer This means you will hear the sequencer s output The audio out is quite a harsh metal sound being a neat digital waveform U...

Страница 35: ...FICATION Leipzig S Power Current consumption 1A Voltage 12V AC DC will not work Power plug 2 1mm Weight mass Approx 3Kg Size 100x222x483mm DxHxW Packaging weight and size LEDs 15 Push buttons 2 Toggle...

Страница 36: ...ecification Analogue Solutions 3 x 6 35mm mono MIDI sockets 2 Power Sockets 1 Leipzig SK Voltage 230V 115V AC check back panel for correct voltage Power plug IEC socket Weight mass Approx 7 7Kg Size 5...

Страница 37: ...es The Pitch Bend MIDI data is sent to the MIDI OUT socket and will also control the on board MIDI to CV converter to affect the pitch of both VCOs equally MOD WHEEL The mod wheel will send MIDI contr...

Страница 38: ...te signal is fed out here from the MIDI to CV converter HEADPHONE The signal is mono Level is controlled together with the main output socket level using the volume control on the front panel EXT1 IN...

Страница 39: ...external analogue synth the internal MIDI CV converter will be disconnected from the internal voice circuits In summary the signal flow is such Internal MIDI CV converter CV Gate out Sockets CV Gate...

Страница 40: ...es of temperature and or moistur or to wear resulting from normal use At the sole discretion of Analogue Solutions the warranty is deemed to be void should the unit be or considered to have been opene...

Страница 41: ...Leipzig S SK User Manual Analogue Solutions 41...

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