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We can retrofit your Sequential Pro-One with MIDI . All you'll see on the outside are MIDI In and Thru sockets, and a red push button. These fit on the back panel to the right of the CV In jack. With the retrofit you'll have MIDI control of Notes, Pitchbend, Modulation, Filter cutoff, Portamento / Glide, Sustain. Note that the retrofit is MIDI In only, there is no MIDI Out. With the retrofit, the MIDI mod wheel controls the LFO of the Pro-One (as its own Mod Wheel does). We can fit the retrofit for you at our workshops in South-West London, or if you have a competent synth service engineer to fit it, you can buy a kit. Click the link below to find out more about the retrofit kit.

Click here for Kenton MIDI retrofit for the Sequential Pro-One


To control your Sequential Pro-One using a MIDI to CV converter, you will need to consider all of the following:
1) Sockets - locating and connecting to the appropriate sockets.
2) MIDI to CV converter and the correct settings for it
3) Leads - selecting the correct ones
4) Settings to make on the Sequential Pro-One to accept the incoming control signals.

1) Sockets
The Sequential Pro-One is already fitted with CV, Gate and Filter control sockets which is all you need for control of the notes and the filter cutoff frequency. The sockets are described below:

CV INPUT ( for controlling the pitch of the notes)
Labelled: CV IN
Socket type: 1/4" mono jack
Connections: Tip = CV input signal, Sleeve = Ground (to screen)
CV converter setting: Volts per Octave (CV) - this is the default setting on our converters.

GATE INPUT (for controlling when the notes play)
Labelled: GATE/CLK IN
Socket type: 1/4" mono jack
Connections (Jack): Tip = Gate input signal, Sleeve = Ground (to screen)
CV converter setting: Gate 5V (Gate - [middle line] on Solo) - this is the default setting on our converters.

FILTER / VCF INPUT
Labelled: FILTER CV IN
Socket type: 1/4" mono jack
Connections (Jack): Tip = Filter control input signal, Sleeve = Ground (to screen)
CV converter setting: - 0 - 10V variable voltage - this is the default setting on our converters.

In other words, you don't need to make any changes to a Kenton converter which is using its default settings.

2) MIDI to CV converter (or USB MIDI to CV converter)
Use this link to see the range of Kenton converters suitable for this model

Kenton MIDI to CV converters

Use the following settings on the converter for this synthesiser:
CV - This synthesiser requires 1 Volt per Octave control. Set the CV select parameter to CV or Volts/Octave - this is the Kenton default setting.
Gate/Trig - This synthesiser requires Gate 5V- this is the Kenton default setting.
Aux1/Filter - This synthesiser requires a 0-10V analogue signal - this is the Kenton default setting

If you don't know anything about MIDI to CV converters and would like to know more, read the following page on our website:

What is MIDI to CV?

3) Leads

You will need the following leads:
3 x 3.5mm mono jack to 1/4" mono jack leads

Click here for 3.5mm to 1/4" mono jack leads – available in several lengths

4) Settings to change on the Sequential Pro-One itself

On the Sequential Pro-One itself you need to set the centre switch in the MODE section of the Pro-One to the "Repeat/Ext" position to allow the gate to work with an external CV converter.


 

 

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