Analogue-Solutions Oberkorn v2 Owners Manual
Contents
1. oberkOrnN mkii its not a small sequencer analogue sequencer user manual gugjo ne zecdneuceL Nel WSUNS ANALOGUE SOLUTIONS oberkorn e amp oe c 10 2001 Contents Intro OBERKORN Professional Analogue Sequencer sssssssssssssnnnnnnnnnnnnnnnnnnnnnne 3 About Analogue Sequencers ssssseeeseeeeeeeseceeeeneneeseeeeeeeeeeeeeeeeeeasesneeneeneeceneneneeeeeeeees 4 Quick EE 4 CV Channels In Details naggesgeuegeg cc cerazccdnesccensuntiasssencnartrtusesscnatecsteteeateaesssccecrenns 5 Gate Channels A By TE 6 Additional Gate Channels bottom row of toggle switches REENEN 6 GV and Gate Output Socket e diegrgekuggeddeesgad sde eg deuegeret SE seen neva aa parea ap eea a Oaa a paee aiaa 6 Gate Output Signals and Gate C Legato Mode ececccceseenceeeeeeeeneeeeeeeeeneeenseeeeeeeeaseeeeeeenseeeeeeeneneeeeeeenees 6 Varying Gate Note Length 2 2 cceceeecceceeeeeeee reese cence eee N R E 7 Splitting CV and Gate outputs sirsie ouenna a ee a Ea KEE aa raa aea aaao 7 step Indicator LED iis a E E etic vec ed E E E E E T 7 Sequencer Control Section E 8 Reset In Socket Changing the Pattern Length of the Geouencer EENEG 9 Reset 10206 BELO EE 9 Controlling Step EE 10 Step Control An Details ascetic csc cece saceve ceasetecdincevncteccccastatscendeacdacitessiactewenects 11 Advanced Information On How Step Control Works Step Control Input Sockets A B C D 11 Eeer 12 Intro OBERKORN Professional2. Analogue Sequencer Inputs Outputs Power Supply External Clock Internal Clock 12V 5V 4x Mux control Step 1 Pulse Reset CV x3 Gate x5 Controls Indicators Size 16 CV pots Gate Switches x3 Tempo LED 84HP 16 Gate switches 3 position Coloured Step LEDs x16 Tempo pot Int Stop Ext Run Stop switch Reset to 1 button Reset to 16 button Step button ANALOGUE SOLUTIONS D S w slk E LU SE P uw mm ue GATEX Y wn CH z A Q Q GGH q 0 Q 4 G q G 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 ober Introduction Oberkorn is a fully fledged professional analogue sequencer providing plenty of control outputs and inputs and with some uniquely creative features never before seen Overview Whilst most new analogue sequencers only offer a limiting 8 steps the Oberkorn offers the all important 16 steps It is a multi channel true analogue sequencer with some remarkable features Below are a list of main features y 3 separate Control Voltage channels y 5 separate Gate channels 3 of the gate channel switches are built into the CV pots The remaining 2 are on a separate row of toggle switches The switches are 3 position providing the 2 Gate outputs with centre being off y Gate channel C is in Legato mode More on this later y Clear step LEDs The 16 step LEDs are colour coded so locating whole note steps is easy y Reset to 16 Just about all other analogue sequenc
3. X gate channel output into the Reset input Position all the GT X gate switches to Off or in Y position except switch 9 As soon as 9 is reach the seqeucner will reset The pat tern will be 8 steps long Note step 9 is never actually reached or played Another example for a 12 step sequence you would have switch 13 on but none before step 13 In short patch a gate output to the reset input The sequencer will reset to step 1 and continue running as soon as it reaches a gate on switch for the gate channel you are using This features like all others on Oberkorn can be operated in real time to allow you to change the pattern length in real time as the sequencer is running Reset to 16 Button Pressing this button will reset the sequencer to step 16 not the usual step 1 like other sequencers although this feature has been included with the Reset to 1 button With just about all other sequencers the sequencer must manually be stepped to the last step otherwise when the clock is started whether an internal or external clock is used step 2 is in fact the first step to be played the CV and Gate settings for step 2 are the first to appear at the sockets not step 1 In a few situations this might not be a problem but as soon as you try syncing another analogue sequencer or use a MIDI sequencer as a master along with some sort of MIDI to clock converter it becomes a problem The analogue sequencer will always be 1 step ahead of the
4. other In these situations you would normally have to manually step the sequencer to the last step each time the sequencer is started Oberkorn is as far as know the only sequencer to automatically go to the last step eliminating this problem speeding up operation and making you life that much easier ANALOGUE SOLUTIONS oberkorn e amp oe c 10 2001 9 Controlling Step Order One common feature of all analogue sequencers is that they always run from left to right i e from 1 to 8 or 1 to 16 depending on how many steps it has OK some let you skip steps but it is still essentially running in numerical order Oberkorn is the first analogue sequencer that allows you to overcome this problem Oberkorn can be programmed to run through the steps in ANY ORDER you wish Steps can be repeated or even missed out altogether In order to describe how this function opperates it is best to briefly explain how analogue sequencers work By feeding a binary code into to ABCD socket inputs any step can be accessed Although it is not likely you have some sort of code you could feed in here as such try patching the Gate outputs into one of these sockets and see how new step patterns are created This is a cool feature that allows more interesting and complex patterns to be created To access any step you need to feed OV and 5V for 1 in the combinations as shown below D C B A Control inputs Step D C B A Control inputs S
5. Stop Press the Reset to 16 switch then restart the sequencer with the Run Stop switch Basically just keep playing around till you get a great sequence ANALOGUE SOLLITIONS Oberkorn e amp oe c 10 2001 4 CV Channels In Details Oberkorn has 16 steps This can be reduced to any number from 1 to 15 More on that later Each column of three CV pots and 1 switch is a step There are 16 columns CV Channels CV A This sets the voltage for CV channel A from OV to 8V CV B This sets the voltage for CV channel B from OV to 8V CV C This sets the voltage for CV channel C from OV to 8V Range Each CV channel has a voltage range of 0 to 10V The Gate on output votlage is 8V enough to drive just about all synths 7 7 See N N N Gate X Y Switch s 5 a s CVA B amp C and Gate A B amp C Control Switches N Ei ral gt o J I Step LED ANALOGUE SOLLUTIONS oberkorn e amp oe c 10 2001 5 Gate Channels A BC Each row of CV pots CV A CV B and CV C has a built in push pull switch Out is Gate off in is Gate on Additional Gate Channels bottom row of toggle switches GT X When the switch is up the Gate for channel GT X is set for that step GT Y When the switch is down the Gate for channel GT Y is set for that step Off When the switch is in the centre position no Gate is set for either channel X or Y CV and Gate Output Sockets The resulting CVs
6. and Gate patterns created from the CV Gate channels are outputed via the CV Gate sockets The CV sockets are labelled CV A CV B and CV C These correspond to the appropriate row of CV pots The CV signals are normally used to control any control voltage input on a synth or modules e g pitch filter cut off VCA etc The Gate sockets are labelled GT A GT B GT C GT X and GT Y These correspond to the appropriate Gate chan nels The Gate signals are normally used to trigger envelope generators or anything with a Gate Trigger input drum machine module monosynth another analogue sequencer sample and hold etc 1 The Gate output level is 7V Gate Output Signals and Gate C Legato Mode Normally for each gate switch that is in an on position a gate signal is sent out of its gate socket If 2 or more gate switches in a row are all on then the gate signal will go off briefly before going on again for the next consecative gate signal This way for instance an envelope will re trigger This is how gate channels X Y GT A and GT B work crock _ LI LJ LI LI lL Gate output for channels L L X Y GT A and GT B GATE SWITCH UP On T T See how each gate switch produces an individual gate Gate outsicnaL_ Li TT oe figure 1 The following section is for advanced users It describes in more technical detail how gate channels X Y GT A and GT B work You only need to tackle this if you wish to fully exploit the
7. direct MUX feature covered later in the manual The gate signal output is actually produced by ANDing a boolean term the state of the gate switch with the clock Gate Switch Clock Gate Signal output off off off on off off off on off on on on From the above table you can see a gate signal is only created when the gate switch is on and there is a clock volt age present As soon as the clock signal goes low Ov or the gate switch is off then there is no gate output ANALOGUE SOLUTIONS oberkorn e amp oe c 10 2001 6 For Gate channel GT C the output is different It is in Legato mode This means that when consecutive gate switches are all on then the output will stay on adding the output of the on gate switches together creating a longer gate signal This way for instance an envelope will not re trigger but stay on for consecative on switches only going off when it meets the first off gate switch This is because the GT C gate switch condition is not ANDed with the clock signal crock _J LI LJ LI LIL GATE SWITCH 14 Gate output for channels GT C UP On T T See how the 2 consecative on gate switches produce a gate signal that is on for the GATE OUT SIGNAL _ duration of the switches figure 2 Varying Gate Note Length All the gate outputs except GT C will have a gate length that is equal the the clock pulse width You can see this by looking at figure 1 So to alter the gate pulse width you sim
8. e control for each step Software sequencers do not offer this advantage and very very few hardware MIDI sequencers do either This makes analogue sequencers more immediate and hands on With this immediate hands on control you can experiment by altering the controls as the sequence plays to evolve and manipulate your patterns in real time As the signals coming from the sequencer are analogue voltages they can be added inverted slewed or whatever and can be used as audio or control signals to feed into other analogue devices Quick Start If you just want to jump straight in and use Oberkorn in it s most basic form to play an analogue synthesiser here s how to do it s Take CV A out into the CV VCO pitch input of your synth 7 Take Gate X out into the Gate or EG trigger input of your synth Press the Reset to 16 button to reset the sequencer It will reset to step 16 This is correct s Flick the Run Stop switch left to Int Internal The sequencer will now run off its internal clock at the speed set by the Tempo control starting at step 1 S Flick the row of Gate switches up to X to produce a Gate pulse to trigger your synth Return the switch to the centre off position for no Gate s Alter the CV A pots to change to pitch CV for each step s Alter the Tempo control till the sequencer runs at the desired speed s If you want to restart the sequencer move the Run Stop switch to the centre position
9. er have an inherant error in that after reseting the machine to step 1 when restarting the sequencer it actually starts on step 2 With our Reset to 16 this problem is overcome For more details on all features of Oberkorn please read the whole manual don t miss any of it s cool features ANALOGUE SOLL TIONS oberkorn e amp oe c 10 2001 3 About Analogue Sequencers Analogue sequencers are devices that allow a sequence up to 16 steps in the case of Oberkorn of voltages and gate signals to be played back in order from 1 to 16 Each step has its own pot to vary CV and a switch to turn the Gate on or off for that step As the sequencer advances through each step the CV and Gate signals for that step are outputed at the CV and Gate sockets When step 16 is reached the sequencer resets to step 1 and starts all over again Oberkorn has 3 CV and 5 Gate channels CV is normally used to control an oscillator s pitch but can be used to control any module that has a CV input such as filter cut off The Gate signal is usually used to trigger an envelope but can be used to control any module with a gate trigger or clock input There are many controls and features on an analogue sequencer to give more overall control over the way the sequencer opperates The major advantage over an analogue sequencer compared to a MIDI Digital sequencer are You have direct access to each note pitch CV and note on off Gate as there is a separat
10. f you wish Knob Pedal CV range 3 5mm socket Pedal CV out 6 35mm socket CV Pedal input Tip is signal ring is 12V sleeve is ground DC socket 500mA 15V AC power input ANALOGUE SOLLTIONS oberkorn e amp oe c 10 2001 12
11. he Reset in jack socket see below Reset to Step 16 When this button is pressed the sequencer will jump straigh to step 16 This button will work even when the sequence is running More on the need for this below Step sequence control 0 O l N A A a A N A h A mm O d i N A INT CLK EXT STEP A TEMPO E RUN STOP INT STOP EXT RESET TO 16 When this button is pressed the sequencer will advance one step This button is best used when the sequencer is not running By pressing the Step button you can set the controls for each step in turn in your own time If the sequencer is on Step 16 or whatever the last step is if set up to have less than 16 steps pressing the Step button will return the sequencer to step 1 This button will work even when the sequence is running A B C D in Details about the Multiplexer control inputs A B C and D are covered later ANALOGUE SOLUTIONS oberkorn e amp oe c 10 2001 8 Reset In Socket Changing the Pattern Length of the Sequencer To change the pattern length to anything lower than 16 you must feed one of the Gate channel outputs into the Reset input socket As the sequencer plays as soon the first gate on signal is reach for the Gate channel you are us ing the sequencer will reset to step 1 For example you want an 8 step pattern Feed the GT
12. nal to control the speed of the sequencer feed a clock signal into the EXT socket When the Run Stop switch is set to EXT the sequencer will run at the external clock rate INT jack socket out The internal clock signal is constantly available from this socket to allow other devices to be sync ed to Oberkorn Step 1 jack socket out Each time step 1 is reached a gate signal is output from the Step 1 socket This allows control of other devices It can also be used to trigger drum voices or envelopes once per bar It can be used to clock another sequencer 1 step each time Oberkorn makes a complete pass Reset jack socket in When a 5V signal is input to the Reset socket the sequencer will reset to step 1 One of the gate outputs can be patched into here to change the sequence length Tempo control This control sets the tempo speed of the internal clock Run Stop When the switch is to the left INT the sequencer will run play It will use the internal clock as a tempo control When to the right EXT the sequencer will run at the tempo set by any external clock signal fed into the EXT clock jack socket The clock signal from the internal MIDI Trigger unit is also wired to the external socket When in the center position the sequencer will not run stop Reset to 1 When this button is pressed the sequencer will jump straight to step 1 This button will work even when the sequence is running The sequencer can also be reset via t
13. ply have to alter the clock pulse width Most VCOs have square wave outputs whose pulse width can be altered This output can then be used to clock the sequencer The Concussor VCO RM is one such module CLOCK Example showing the ef fect a clock signal with vary eae Ge J T t J T ing pulse width has on the gate signal This does not apply to channel GT C GATE OUT SIGNAL figure 3 Splitting CV and Gate outputs All CV and Gate channel outputs are buffered This means their signals can be split many times with a multiple without losing any level Step Indicator LED Each Step has an LED indicator to show which step the sequencer is on The LEDs are just to the right of each step LEDs 1 5 9 and 13 are red to indicate quickly the whole notes in a 4 4 pattern LEDs 2 3 4 6 7 8 are yellow to indicate the notes in the 1st half of the sequencer LEDs 10 11 12 14 15 16 are green to indicate the notes in the 2nd half of the sequence When the sequencer is not running the voltage represented by the relevant CV control is continuously available at the relevant CV output It will not change till the sequencer is either manual stepped or clocked to the next step The CV controls can be altered in real time to alter the CV output whilst the sequencer is stopped ANALOGUE SOLUTIONS oberkorn e amp oe c 10 2001 Sequencer Control Section EXT jack socket in If you wish to use an external clock or other gate sig
14. s are routed to the CV output socket in turn How Oberkorn Can Access Any Step Counters always count in upwards and in order from 1 to a higher number There are counters that count down but you never see these incorporated into sequencers The way in which Oberkorn can be made to step in any order is by completely bypassing the counter feeding your own signals into the 4 bit address bus of the multiplexer The multiplexer address bus can be programmed via the control input sockets on the front panel Using the Control Input sockets A B C amp D on the front panel Use any 0 5V signal to control these inputs e g LFO Gate etc It will have the same affect as if using the 4 MIDI Triggers were used Now to understand how to access each step refer to the binary conversion table below D C B A Control inputs Step D C BA Control inputs Step 000 0 step 1 L000 step 9 0001 step 2 L step 10 0010 step 3 L010 step 11 0011 step 4 LO E L step 12 0100 step 5 L100 step 13 0101 step 6 Ld lt Q 2 step 14 0110 step 7 L110 step 15 0 1 1 step 8 Le step 16 ANALOGUE SOLL TIONS oberkorn e amp oe c 10 2001 11 Case If you have bought the Oberkorn with the AS0084 case The AS0084 case is a generic case that has additional features when used with Concussor modules Some of these are not used with the Oberkorn Back panel left to right 2x 6 35mm sockets these are unwired and spare These can be internally wired up i
15. tep 0000 step 1 L000 step 9 0001 step 2 L 0 Or step 10 0010 step 3 LOLO step 11 0011 step 4 LD lL step 12 0100 step 5 L100 step 13 0101 step 6 L 1 0 1 step 14 0O 1 10 step 7 W s He Re step 15 0111 step 8 L111 step 16 ANALOGUE SOLLITIONS oberkorn e amp oe c 10 2001 10 Step Control In Details Advanced Information On How Step Control Works Step Control Input Sockets A B C D How analogue sequencers work 4 bit control bus figure 4 I COUNTER CV Output There are 3 main elements to the sequencer ES CV controls x 16 The clock is basically a square wave LFO The counter counts the clock pulses The counter produces a 4 bit binary output an address to represent step posi tions 1 to 16 see conversion table below This is transmitted via a 4 bit address bus to the multiplexer Each address line can have a high or low output The multiplexer is an electronic analogue switch It can have a number of inputs and outputs in this case 16 inputs and 1 output The 16 inputs are the voltage output from each CV control The output is routed to the CV output socket The 4 bit binary address signal representing the numbers 1 to 16 selects which of the 16 inputs to the multiplexer is switch to the output i e which voltage from the 16 CV controls is routed to the CV output As the counter counts clock pulses it counts up from 1 to 16 When it reaches 16 it resets to 1 It is in this way that the 16 different CV control
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