My experience with sending real-time parameter values to the DX7 has
been that if you send the usual sysex midi data, the voice will reset
every time, causing a stutter in the sound if the parameter values get
changed while you are playing a note. The DX7II didn't have this
problem, and can have it's parameter values changed while being played
without any real problems. In order to tweak parameters real-time on
the original DX7 without problems, you can use an undocumented
command. This lets you send midi commands to it that will mimic front
panel button presses. Only problem is, to tell it to change a
parameter value by a value of 20 would require telling it to pretend
that the + or - button was pressed... twenty times! At several bytes
per "press", the data adds up fast. Which means you can't update
values very fast. This undocumented command is also on later DX series
instruments, and is documented on them.
I gave up doing real-time control on my original, and went to a DX7II,
using this:
http://img56.imageshack.us/img56/4961/protostrip2small29zx.jpg
If anyone wishes to know the commands for mimicing button presses on
the DX7, I can look up the info.
--- In YamahaDX <at> yahoogroups.com, "dave_dillabough" <daved <at> ...> wrote:
>
> The best picture that I have found is at
> http://www.synrise.de/images/jms-dx-programmer.jpg
>
> It says here
>
http://www.sequencer.de/moogulatorium/moogulatorium_specials.html#Anchor-ein-49575
> that the box sends strings of SysEx codes via MIDI.
>
> Looks like a neat toy.
>
>
> --- In YamahaDX <at> yahoogroups.com, "Wheaton, Simon" <simon.wheaton <at> >
> wrote:
> >
> > Does anyone have a Jellinghaus DX-Programmer for the DX-7?
> >
> >
> >
> > I am wondering if they work well.
> >
> >
> >
> > I would like to get a closeup image of the front panel, to see
what all
> > the functions are.
> >
> >
> >
> > Any idea what sort of data the DX-Programmer outputs in relation to
> > movements of it's pots and switches?
> >
> >
> >
> > I am wondering if it could be cloned using the MIDIBox open platform?
> >
> >
> >
> > Thanks,
> > Simon
> > Canberra
> > AUSTRALIA
> >
> >
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