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4ms SCM Breakout ( SCMBO )

End of production
Breakout module that gives various voltage control to SCM

Format: Eurorack
Width: 8HP
Depth: 26mm
Current: 14mA @ + 12V, 0mA @ -12V
Manual pdf (English)

This module does not need to be connected to a power source. Please connect only with the SCM main unit.


SCM Breakout (SCMBO)Shuffling Clock MultiplierIt is a function extension module of. In addition to the Shuffle / Slip / Skip control, a new function of pulse width / mute / 4x speed control has been added.Each function has a manual knob and a CV input.

  • CV Shuffle knob and CV input to select beats to slip with CV Slip
  • CV Skip knob and CV input that omits specific beats in the pattern
  • CV Pulse Width knob and CV input to control the width of the output pulse
  • 4x Fast switch and CV gate input to quadruple all output jacks.Switch can also be used to invert the input signal
  • Mute switch and CV gate input to stop the generation of output pulses.Switch can also be used to invert the input signal
  • Resync trigger input to reset the beat pattern to the starting point
  • Two knobs and CV input corresponding to Rotate and Slip jacks on the SCM body


Connection with SCM body

Use the included 16-pin ribbon cable to connect to the main unit.First, remove the 6 jumpers from the "BREAK OUT" or "JUMP / BO" header on the back of the main unit.Then connect the ribbon cables correctly so that both red stripes face the bottom of the module.

* Be careful not to connect SCMBO to the Eurorack power supply.

CV Shuffle

This feature, which is closely related to CV Slip, controls which beats are slipped, whereas Slip controls how much a particular beat is advanced in time.When the knob is set to the minimum value, it is set every other beat.As you increase the value, it is first applied to Slip every 1 beats, then every 3 beats, every 4 beats, every 5 beats, and finally every 6 beats at a specific point within the knob range.Values ​​above this point will cause Shuffle to behave differently, advancing a group of beats rather than a single beat.

CV Skip

Use this feature to exclude beats from each bar.The bar concept is based on 8 beats. Jacks that output x8 or less are considered the first "n" beat of a bar (eg s5 = the first 5 beats of a bar). When the Skip knob is at its minimum, all beats are played, and as you increase the value on the knob or positive CV, beats are omitted.The beat patterns that are omitted are determined by the SCM code lookup table.

CV Pulse Width (PW)

Pulse Width is a useful feature that affects all eight outputs.When the knob is at its minimum, each jack outputs a very short pulse of a few milliseconds.Raising the knob to approximately the center value will result in a pulse width of approximately 8%, resulting in a balanced square wave setting.With this setting, the time that the waveform stays at 50V and the time that it stays at 0V are equal.This is a very useful setting to start learning SCM.When set to the maximum value, the pulse width becomes very long and the waveform becomes low (10V) for only a few milliseconds, so it can be functionally regarded as an inversion trigger.One thing to keep in mind when the pulse width is very long is that the Slip / Shuffle effect is also very small.This is because Slip / Shuffle pushes forward in time without changing the pulse width of the beat.The gap between the pulses becomes very short, and the slip effect diminishes because there is not enough room to move without completely closing the gap. To hear the Slip / Shuffle effect best, set the pulse width to 0% or less.Another way of thinking is that PW is a way to reduce only the effect with CV without changing the Slip itself.In addition, you can check the function of PW by blinking the button for any purpose.

4x Fast

As the name implies, all output jacks are quadrupled by button operation or sending a gate above 3V.As an example patch, connect one of the outputs to a 4x Fast input (try x4).When the output becomes high, all jacks including itself become 2x speed, and when it becomes low, it returns to the original speed.This is a very simple way to create a chaotic rhythm pattern. You can also give a dramatic effect to the pattern by using PW together. 


This simple and convenient feature stops all jacks from generating pulses by pressing a button or sending a gate above 3V.The jack that is already outputting the signal will continue to output at the normal timing, but when the output becomes low, it will stop generating and stay low until Mute is released. Let's patch the output of SCM to the Mute jack as well as the 4x Fast feature.When the output goes high, other jacks stop generating new pulses, and when the output goes low, it returns to normal performance.This drops out beats in a rhythmic, anti-deterministic way. It is also possible to give a dramatic effect by using PW together.


The beat pattern is returned to the starting point by sending a CV trigger of 3V or higher to the jack.The beat pattern is determined by Skip, Slip, Shuffle. Resync is a different function from general Reset.The clock multiplier does not have a dedicated Reset jack because it resets itself for each input clock pulse. The Resync jack shifts the beat pattern and restarts it at a specific point between pulses.To confirm this function correctly, input an extremely slow clock to the SCM (eg, between pulses = 4 seconds).Then randomly configure Skip, Slip, Shuffle and connect the manual gate to the Resync jack. Listen to the output of the s8 jack and learn the beat pattern.You can see the beat pattern restart instantly by sending the gate. When the SCM receives the next clock pulse, it restarts itself again, so different beat patterns continue for less than a bar.

CV slip

The CV value to the Slip jack of SCMBO is added to the voltage of the Slip jack of the SCM main unit. The two jacks and the Slip knob can be used at the same time.

CV Rotation

The CV value to the Rotate jack of SCMBO is added to the voltage of the Rotate jack of the SCM main unit. The two jacks and the Rotate knob can be used at the same time.