[sdiy] midi clock

[patchell]

    The Atari ST used the extra two pins on I think the Midi Out for Midi
Thru....this has caused me problems with some cables in the past as well (cable
that were not really wired correctly, IMO)...

harrybissell wrote:

> Hi Rude...
>
> Watch out for grounding. Some midi inputs and outputs do not handle the grounds
> properly.  There should NOT be a ground between units established by the
> MIDI cable. I had this on a unit that would only work at the end of the midi
> chain, not the middle (the thru was not 'ungrounded' properly)
>
> Early MIDI cables often had only two conductors... modern ones have all five.
> The normally unused ground pin might be a problem... or possible some
> non-standard uses of the additional lines (I think some drum machines did sync
> on these ???)
>
> H^) harry
>
> Rude 66 wrote:
>
> > aha.. that would explain some things. but would that also explain why it
> > behaves like that when i use only 1 909 midi output into a splitter? it's
> > basically 1 in, 2 out with only a 3 pin connection. there's no direct
> > contact between the 2 outs in the split box. how can either the linn or the
> > 909 detect when i stick a  second midi connector in there?
> > the problem is the 909 is the only clock that &^%$ linn will sync to...
> >
> > i don't know how happy i'd be messing inside my 909 though.. one of the
> > reasons i've stuck to toys and cheap machinery is the room to screw up..;-)
> >
> > thanks for the info so far!
> >
> > ruud
> >
> > ----- Original Message -----
> > From: "Colin f" <colin at colinfraser.com>
> > To: "Rude 66" <r.lekx at chello.nl>; "'synth DIY'"
> > <synth-diy at dropmix.xs4all.nl>
> > Sent: Tuesday, December 03, 2002 3:32 PM
> > Subject: Re: [sdiy] midi clock
> >
> > > ----- Original Message -----
> > > From: "Rude 66" <r.lekx at chello.nl>
> > > To: "Paul Maddox" <P.Maddox at signal.qinetiq.com>;
> > > <tim101 at tstinchcombe.freeserve.co.uk>; "'synth DIY'"
> > > <synth-diy at dropmix.xs4all.nl>
> > > Sent: Tuesday, December 03, 2002 1:34 PM
> > > Subject: Re: [sdiy] midi clock
> > >
> > >
> > > > i have this weird midi clock problem. i'm using my 909 to send midi
> > clock
> > > to
> > > > my pc and studio, and to trigger an external midi-syncbox that sends out
> > > > sync to the linn drum.
> > > > now when i use the 909/linn combo alone, there's no problem. it syncs
> > like
> > > a
> > > > charm. as soon as i hook up the second midi out to the studio, the sync
> > to
> > > > the linn stops. it does this both when i use the 909's 2 midi outs, and
> > > when
> > > > i use a splitter box for th midi signal.
> > > > how is this possible? does the 909 stop sending clock as soon as it
> > feels
> > > > there's more than 1 midi input conencted to it? the weird thing is
> > > sometimes
> > > > it does decide to work. i've changed cables, reset things, you name it.
> > >
> > > Have a look at http://www.colinfraser.com/tr909/909mods/909midi.htm
> > > That explains the problem when you have both 909 midi outs in use.
> > >
> > > Colin f
> > >

--
 -Jim
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