4ms SCM BREAKOUT PANEL
Contents
1. of the knob Another way to say this is that the knob controls the DC offset of the CV signal and the CV signal is DC coupled to the circuit The result of this addition of the knob and CV input is then clipped to the range of OV to 5V which is the operating range for the SCM What this means is that you don t have to limit your incoming CV signals to OV 5V any positive or negative signal between 12 15V and 12 15V may be useful For example feed a slow triangle or ADSR type waveshape from a Bananalogue VCS or a Makenoise MATHs or any Doepfer A 14X into the PW jack With the PW knob at minimum only the positive half of the incoming waveshape will increase the pulse width and the negative half of the waveshape will be ignored If you turn the PW knob to center then the positive part of the waveshape will make the PW increase and the negative part of the waveshape will make the PW decrease If you turn the PW knob all the way to maximum then only the negative part of the waveshapes will have an effect they ll make the PW decrease from maximum and the positive half of the waveshape will be ignored Strange interaction note When feeding the Wiard Malekko Envelator s output directly into a CV jack on the SCM breakout the corresponding knob should be turned all the way down A very useful and full range of modulation can be obtained this way as long as the knob is kept at 0 Turning the knob up may alter the Envelator s oscillation Running2. the Envelator into a buffer or VCA before the SCM avoids this Using the Flip Switches The 4x Fast jack and the Mute jack are normalized to their associated flip switches So by plugging something into the jack the switch is disabled Applying a gate signal of at least 3V to the jack will cause the feature to turn ON You can even input a complex waveshape and the feature will turn on and off as it crosses the 3V threshold lll Description of Controls CV Shuffle CV Shuffle is closely related to CV Slip which is described in the main SCM manual download from http www 4mspedals com scm php While Slip controls the amount that certain beats are pushed forward in time Shuffle controls which beats are slipped The default setting is every other beat Shuffle at minimum As you turn Shuffle up first every third beat will be slipped then every fourth beat fifth sixth and finally at about the middle of the knob s range every seventh beat will be pushed forward From the middle of the range to the maximum Shuffle behaves differently Instead of pushing just one beat forward it pushes groups of beats forward So at first a group of two beats are slipped then a group of three etc CV Skip CV Skip is used to drop beats out of each measure The concept of the measure is based on 8 beats The jacks that output less than x8 are considered to be the first n beats of the measure e g S5 jack is considered to be the first 5 beats of
3. 4ms SCM BREAKOUT PANEL expansion module for the Shuffling Clock Multiplier User Manual v1 0 http www 4mspedals com scm php Features e Expansion module for the 4ms Shuffling Clock Multiplier e CV Shuffle jack and knob e Selects which beats are slipped by CV Slip e CV Skip jack and knob e Omits certain beats in a pattern e CV Pulse Width jack and knob e Controls width of output pulses e 4x Fast jack and switch e CV gate or manual switch speeds up all jacks by a factor of 4 e Mute jack and switch e CV gate or manual switch stops any more pulses from starting e All pulses that have already started will end normally e Re sync CV Trigger input jack e Resets beat pattern to beat one e Additional CV Rotate and CV Slip jacks e Adds to the main panel s Rotate and Slip jacks OD 2 m3 ons e 8 H P Eurorack module S C M A og o 4 e Connects directly to the SCM with a standard 16 pin cable same cable used for Eurorack Doepfer style power connections e SCM Breakout does not connect directly to the power rail I Installing the SCM Breakout The SCM Breakout connects to the main SCM with a 16 pin Doepfer style power cable First remove the six jumpers from your SCM s BREAKOUT pcb version 1 0 2 or JUMP B O pcb version 1 0 3 header The jumpers are not needed any more Now look carefully at the main SCM s JUMP B O or BREAKOUT header Also look at the 16 pin header on t
4. a measure With Skip at minimum all beats are played As you turn the Skip knob up or apply a positive CV more and more beats will be dropped out The pattern of dropped beats is determined by a lookup table in the SCM s code Each CV voltage corresponds to a particular pattern in the lookup table There are 128 entries in the table which range from O beats dropped to each one of 8 beats dropped to every permutation of 2 dropped beats to every permutation of 3 beats dropped to nearly every permutation of 4 beats dropped out of an 8 beat measure Then the table is inverted so that it continues to 5 6 and 7 beats dropped Dropping all 8 beats is avoided since the Mute feature has this same functionality CV Pulse Width PW Pulse Width is a very useful feature that affects all 8 output jacks With PW at minimum each jack will output a very short pulse about _ ms This is enough to trigger most other modules but no more than necessary As you increase PW to about the knob s center setting the pulse width will be 50 which is a nicely balanced square wave At this setting the amount of time the waveshape spends being low OV is equal to the time it spends being high 10V This is a fairly useful setting for getting started with learning the SCM At its maximum setting the pulse width becomes very long in that it only blips low for __ms This is functionally an inverted trigger One thing to watch out for with a very long pulse w
5. gh This is the easiest way to kill the light show on the SCM But more useful and blinding is patching an SCM output to the Mute jack When the jack goes high no new jacks will turn on but when that jack goes off normal play resumes This drops out beats in a rhythmic semi deterministic way Like patching to the 4x Fast jack playing with PW will effect the pattern dramatically Resync Applying a CV Trigger gt 3V to this jack will cause the beat pattern to start over The beat pattern is established by Skip Slip and Shuffle CV Slip The CV Slip jack on SCM Breakout adds to the voltage of the main SCM s CV Slip jack Both jacks can be used simultaneously along with the Slip Knob See the SCM manual for a description of CV Slip CV Rotation The CV Rotate jack on SCM Breakout adds to the voltage of the main SCM s CV Rotate jack Both jacks can be used simultaneously along with the Rotate knob See the SCM manual for a description of CV Rotation
6. he SCM Breakout board Notice that on both boards there s a small white box printed next to one pin the pin itself may have been removed When you connect the cable between the two modules make sure the red stripe of the cable is orientated towards the white box on both units NEVER CONNECT THE SCM BREAKOUT MODULE DIRECTLY TO A POWER DISTRUBUTION BOARD The SCM Breakout only connects to an SCM and never directly to the power rails Although it uses the same cable used for eurorack module power connections the SCM Breakout DOES NOT CONNECT TO THE POWER RAILS on your modular system Instead it draws power from the SCM module itself very little current is consumed Remove the jumpers and connect the red stripe of the cable to the side closest to the white square on both the main SCM and the Breakout ll Operation Getting Started The knobs on the SCM Breakout rotate from about 4o clock at minimum to about 2o0 clock at maximum The center of each knob s range is at 9o clock A good way to start is to first turn the knobs to their default settings Shuffle Skip and Rotate all the way down counter anti clockwise Slip and PW turned to center Also flip both switches to the right so that 4x Fast and Mute are not engaged This is the default setting for an SCM with all the jumpers set and nothing plugged into Slip or Rotate After getting a feel for the Knobs try running a CV signal into one of the jacks Rotate or PW might be good choice
7. idth is that the Slip Shuffle effect will have only a very small effect This is because Slip Shuffle pushes the beats forwards in time without changing their pulse width So when the width of the pulse is very long and the gap between the pulses is very short there isn t much room to move without completely closing the gap between pulses Therefore not much slipping can occur To best hear the Slip Shuffle effect keep PW at 50 or less Another way to think about this is that PW is a CV way to decrease the amount of Slip effect without changing Slip itself However you use it watching the lights flash is a good way to see what PW is doing 4x Fast Like it s name says flipping the switch to the left or applying a gate voltage greater than 3V will make every jack go four times as fast One quick and fun patch is to connect one of the SCM outputs to the 4x Fast input e g try the x2 jack When the jack goes high it will soeed everything up including the jack itself so when it quickly flips low everything slows down this is a very simple way to create a chaotic rhythm pattern Playing with PW dramatically effects the pattern Mute Mute is a very simple and useful feature flipping the switch to the left or applying a gate voltage greater than 3V will prevent any new jacks from turning ON Any jack that s already outputting a high signal will continue on its normal timing but when it goes low it will stay low as long as the Mute gate is held hi
8. s to start with Try running a very slow triangle wave into the one of these jacks about 2 5 seconds per cycle and watch the lights and or listen to the SCM trigger gate things differently If you re modulating PW you should see the lights stay on longer and longer as the triangle rises and then get shorter and shorter as the triangle falls A fun sample patch to try next is to trigger a Low Pass Gate Borg Filter or Model 13 DTG with the x8 jack and another similar LPG etc with the S8 jack Run an oscillator or some sound source into both LPGs and mix the outputs together so you can hear both at the same time Now on the SCM Breakout turn Rotate Shuffle and Skip all the way down Turn PW to 50 and adjust to suit your ears Now play with Slip slowly turn the knob along its full range and listen to how every other beat from the S8 jack lands later and later as you turn Slip up Now nudge Shuffle up until the beat pattern changes Play with Slip some more Keep nudging Shuffle up and playing with Slip Once you get a feel for all the possibilities with those two knobs start playing with the Skip knob you should hear some beats drop out of the S8 sound but the x8 will continue thumping steadily along Using CV and the Knobs at the Same Time To modulate a parameter you can simply turn the knob until you get the desired result Also you can feed a CV signal into the associated jack the signal applied to the CV jack will be added to the setting
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