Elektor Formant Modular

Hi there, if the ADSR works ok with the analog keyboard, than only�2 things can cause this problem in my opinion:

�

1.�Your MCV4 is defect�on the aspect of generating the gate-pulse. That means it doesnot generate a gate-pulse at all or it generates a gate-pulse�with a different voltage.�You�can check�this by measuring the gate output of the MCV4 while pressing a key.�If you are not�comfortable with electronics, ask somebody who can help you with this.

2. Something goes wrong�in the connector(s) or in�the cabling from MCV4 to Formant.�If you did pass check 1 and have found that your MCV4 is ok, than check if the pinning of your MCV4 output is compatible with�Formants input. So, you can simulate a 5 volt pulse (with a battery or powersupply) to the input of the�Formant connector. If the ADSR's react on that pulse, you have the correct pinning. This should be compatible with MCV4.

�

Good luck from Holland,

Arjo�

--- On Thu, 4/17/08, astroschnautzer wrote:

From: astroschnautzer
Subject: [ElektorFormant] Re: midifying elektor formant?
To: ElektorFormant@yahoogroups.com
Date: Thursday, April 17, 2008, 10:10 PM

--- In ElektorFormant@ yahoogroups. com, "Jean-Pierre Klerx" wrote:
>
> --- In ElektorFormant@ yahoogroups. com, "astroschnautzer"
> wrote:
> >
> > --- In ElektorFormant@ yahoogroups. com, "Jean-Pierre Klerx"
> wrote:
> > >
> > > --- In ElektorFormant@ yahoogroups. com, "astroschnautzer"
> > > wrote:
> > > >
> > > > --- In ElektorFormant@ yahoogroups. com, "Jean-Pierre Klerx"
>
> > > wrote:
> > > > >
> > > > > --- In ElektorFormant@ yahoogroups. com, "astroschnautzer"
> > > > > wrote:
> > > > > >
> > > > > > I want to midify my elektor formant, I have a doepfer mcv4
> and
> > > the
> > > > > v/oct works great but the
> > > > > > gate doesn`t. I guess the doefer has a 12v gate and the
> elektor
> > > 15v
> > > > > or something like that.
> > > > > > How should I go if I want to convert the 12v to 15v signal?
> Or
> > > is
> > > > > there another answer to this?
> > > > > >
> > > > > > -Wille
> > > > > >
> > > > > Dear Wille,
> > > > >
> > > > > I use also this MCV4, and works great, also the gate-puls. It
> is
> > > an 5
> > > > > Volt pulse possitive,it means it goes from 0 to 5 Volt, you
> can
> > > program
> > > > > the mcv4 for an 0 to 5 Volt or a 5 to 0 Volt, so you have to
> > > change it
> > > > > the right way mentioned above. Succes
> > > >
> > > >
> > > > well I tried it but did not work with mcv4 or kenton pro solo,
> > > mayby i have missed
> > > > something with the soldering of the gate or something, any
> ideas?
> > > > >
> > > >
> > > What do you mean, can`t you program the gate pulse suited for the
> > > Formant I earlier mentioned or what.The gate pulse goes from 0 to
> 5
> > > volt as a pulse until you press a key from your Midi keyboard.
> The
> > > ADSR-modules need this pulse as a trigger to start. That`s it.
> > >
> > > JP Klerx
> > >
> > Yes, this is what I thought it to be too, but I haven`t been able
> to get it to work like this
> > so I thought it was something else that was the problem...and it
> indeed is then something
> > else that is the problem.
> >
> Have you still the interface between the analog keyboard and the
> Formant, because this is where you have to plug in your mcv4. Or do
> you have the external inputs at the ADSR-module earlier mentioned on
> this board. This has to be working. Can you messure the voltage of
> the gate-pulse with a Voltmeter.Good luck.
> JP Klerx
>
I have "replaced" the analog keyboard with the mcv4, the gate works correctly with the
keyboard, I will have to try and measure the gate pulse then, it is probaly no big issue I
just haven`t got any experience in electronics so have to ask a question quite often:)
thanks for your help!

-Wille