Control Voltage, LFO and Slew

I want to assign an LFO to a CV output. However…

There are only 4 targets for CV in Melodic mode.

Pitch, Gate, Mod Wheel and Velocity. These all have a minimum of 0V and a maximum of 5V.

Is there any way to have a minimum of -5V and a maximum of +5V?

Maybe 0V patched to 64 on the Mod Wheel?

My goal is to trigger an LFO filter sweep that rises and falls above a cutoff point, preferably in time with the sequencer.

I have the MPC X SE running mpc3.4.0.015

gr00veh0lmes wrote:I want to assign an LFO to a CV output.

Which LFO? AFAIK a CV track has no LFO.

gr00veh0lmes wrote:There are only 4 targets for CV in Melodic mode.

You can set CV values also either as automation or in the step sequencer. You can use the presets of the latter to get something like a limited set of LFO forms.

gr00veh0lmes wrote:These all have a minimum of 0V and a maximum of 5V.

Is there any way to have a minimum of -5V and a maximum of +5V?

I assume 0V to +5V is a hardware restriction, but I couldn't find it in the manual.

So you need an offset and attenuverter to create a bipolar CV.

yes, HW restriction
it will never go beyond 0-5V

Many thanks for the replies, at least now I know the limitations I can come up with other solutions.

I understand why 0-5V may be a hardware limitation, but a Mod Wheel has a centre indent of 0V and a +/- of 2.5V, of course the MPC X doesn’t have a Mod Wheel.

But neither does it have a pitch bend and that is an adressable CV function.

Using the Step Seq is useful for creating LFO shapes, but again that only ranges from 0-5V, there appears to be no way of assigning a 0V value to a value of 64.

I really hope there’s a software solution to this oversight.

gr00veh0lmes wrote:I really hope there’s a software solution to this oversight.

Nope. You need to get a Doepfer A-183-2, Dreadbox Utopia or a used Erica Synth PICO Scale (discontinued). Or anything that creates a negative offset voltage and mixes CV signals.

Most MIDI to CV converters and controllers with CV output I know are only capable of positive voltage. Maybe it is harder to build something that centers stable on 0V.

The output from a DC coupled audio interface should center on 0. But you can't drive those from the MPC's CV tracks.

endorphin shuttle gives you -5 ->+5 V MIDI2CV, so does the MUC-810 (http://www.edv-technik-ts.de/html/price-list.html)
vermona makes an excellent polarizer and some 1U mixer/buffer/attenuator

wavejockey wrote:endorphin shuttle gives you -5 ->+5 V MIDI2CV, so does the MUC-810 (http://www.edv-technik-ts.de/html/price-list.html)

The MUC-810 is really hard core engineering. No design thrills

Both products cost more than the half of an MPC One though. I assumed the OP was looking for something cheaper.

Didn't know that the shuttle control is such a beast.