[sdiy] Midi problems

[Jim Patchell]

    Yes, of course.  But still, your firmware must be prepared to deal
with this.  One of my early Midi->CV converters worked just fine with
one of my Midi keyboards, but would do strange things with the other
keyboard...the second keyboard would send out Midi Clock messages all
the time.  Took me a long time to figure that one out.

Tim Ressel wrote:

> Now, wait: when you say a midi clock can occur in the
> middle of another message, you must mean in between
> bytes, right?  Otherwise the UART would go kablooie.
>
> --- patchell <patchell at silcom.com> wrote:
> >     Hi Tim....DON'T PANIC....yet!
> >
> >     Everything is as it should be.  If you look in
> > the Midi Spec, this
> > behavior is documented.  It seems it is up to the
> > implementor if Note
> > OFF is used or Note On with velocity of zero is
> > used.  You also have to
> > watch out for Running Status, and also, you have to
> > be aware of the fact
> > that a Midi Clock can occure anyplace, including in
> > the middle of
> > another midi message...lots of fun going on in
> > Thar!.
> >
> > Tim Ressel wrote:
> >
> > > Hey all,
> > >
> > > After days of avoiding eye contact with the
> > Midi2cv
> > > project which has been consistantly kicking my
> > butt,
> > > I've dug back into it.
> > >
> > > Guess what? I took a look at the midi info from my
> > > kbd, and I seem to be getting Note On ($9x)
> > commands
> > > for both key down and key up.
> > >
> > > Have I missed something here?
> > >
> > > I have to scope it and look at the bits, which is
> > > pretty tough. But I'm quite sure I'm seeing the
> > same
> > > upper bits in the first byte for both events.
> > >
> > > Is my board whacked? Does anyone know anything
> > about a
> > > Kaysound MK-4902?
> > >
> > > HHHHHHHEEEEEEEELLLLPPPPPPPPPPPPPPPPPPPP!
> > >
> > > --TR
> > >
> > > __________________________________________________
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> >
> > --
> >  -Jim
> > ------------------------------------------------
> > * Visit:http://www.silcom.com/~patchell/
> > *-----------------------------------------------
> > *I'm sure glad Merry Christmas comes just once a
> > year
> > * -Yogi Yorgensen
> > ------------------------------------------------
> >
> >
>
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