CV Trigger Section

Jack J1 : Analog Trig IN (connect to trig out of a vintage drum machine)

Jack J2 : Analog Clock IN (24ppqn, SYNC24)

 

The CV trigger section allows you to connect the TRIG OUT of a vintage drum machine in order to control the arpeggiator clock. You access the trigger on the front panel through Jacks J1 & J2. Then a circuit made of Zener diodes limits voltage to +5.1V to protect the inputs of the arduino board.

The trigger must be an electrical short pulse signal between +5V and +15VDC (typical output of a TR808 or TR707). You can try with analogue audio but the envelop is certainly too long (even on rimshot or clave) ; you need a dirac.

 

 

 

 

 

On PCB prior to rev1.4 you need to use Dupont wires to connect the trigger circuit to the arduino.

 

 

With PCB rev1.4 you simply set jumpers on CV1 and CV2 to connect the Jacks J1 & J2 to the arduino (faster and easier).

 

 

 

 

 

 

Recent Posts

Matrix Ctrlr firmware v1.42

A new Matrix Ctrlr firmware is available on GitHub as a free update :

  • better workflow to save the patches (turning the encoder show temporarily the name and the position). Thanks to Thomas P. Heckmann for the help !
  • minor enhancements on boot to reach quickly Test Mode.
  • Chord Memory based on Roland alpha Juno feature

 

On page5 of ARP menu, 3 different chords (e.g : Major, minor and 7dim) can be memorised at the same time and you select the one you need  :

They are empty by default. To create a chord in cm1 slot, press KEY3 to select. Press KEY1 to record the chord. Play a chord on your keyboard (6 notes max), release. The chord is in memory cm1 (wiped on power off). You can immediately find back this chord by pressing C4 (midi note 60) on your keyboard and transpose it all along the other keys ; this is very inspired by alpha Juno.

 

 

Many people are asking for Matrix Ctrlr kits. We are working on it, but you may know that the prices of the components have been multiplied by 2 or 3 lately, especially semiconductors – and there is a chips shortage on top of that ! Taxes and freight are also higher, so we do our best to keep costs down (we have to be very creative). You may expect a little rise in our prices …

 

 

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