[sdiy] Handling MIDI Running Status from Power-up

[Neil Johnson]

Isn't this what Active Sense is for?  To detect when a cable becomes
unplugged and put the receiving device into a sane state ready for
reconnection?

Neil

On Thu, 14 Nov 2019 at 14:43, chris <chris at chrismusic.de> wrote:
>
> I understood the OP that he's dealing with the receiving side (where you
> actually can't do much about it, you'd have to guess a status byte you
> never saw).
>
> If it's about the sending side, it's quite easy - after say, 10 sec of
> no MIDI commands sent, send the next message with full status byte.
> This doesn't affect bandwidth in case of heavy traffic, and the
> situation described will be fixed by cluelessly scratching you head for
> 10 seconds.
>
> Chris
>
>
>
> On Thu, 14 Nov 2019 15:54:48 +0200 Mikko Helin <maohelin at gmail.com>
> wrote:
>
> > The sending device could monitor the current of MIDI loop.
> > You could also build a device ("a man in the middle") which tracks the
> > connections but it would mean increased latencies.
> >
> >
> > On Thu, Nov 14, 2019 at 3:36 PM Tom Wiltshire <tom at electricdruid.net> wrote:
> >
> > > I’ve never seen it before (despite having done a fair bit of MIDI coding),
> > > but I’m not surprised that causes a problem, and I’m not sure I’d bother to
> > > fix it. It’s a rare enough situation to not require a solution, and anyway,
> > > you’ve already found a work-around for the times when it might crop up -
> > > just wiggle the pitch bend.
> > >
> > > I can’t see how you *would* fix it anyway. The sending device doesn’t know
> > > what is at the other end of the MIDI connection, so there’s no way for it
> > > to know if the device has changed. Hence the best you can do is offer the
> > > user some simple fix to do when they change devices - which you’ve got
> > > already.
> > >
> > > Tom
> > >
> > > ==================
> > >        Electric Druid
> > > Synth & Stompbox DIY
> > > ==================
> > >
> > > On 14 Nov 2019, at 13:09, ackolonges fds <ackolonges at hotmail.com> wrote:
> > >
> > > Hi All,
> > >
> > > I've run into a MIDI running status issue while writing and testing my own
> > > MIDI parser, and I was wondering if anyone on here has heard of any
> > > practical way of handling it.
> > >
> > > Here is the scenario: You have been playing notes on a (hardware) MIDI
> > > sound module via your MIDI keyboard that makes use of running status. You
> > > then power-up a second sound module, unplug the MIDI cable from the
> > > previous one, and plug it into the second one. When you continue playing
> > > notes, they are not received by the second module, because it did not
> > > receive any status bytes due to the use of running status. The only way to
> > > begin playing notes with the second module is to then send another type of
> > > MIDI message such as Control Change or Pitch Bend to 'break' the running
> > > status, and force the sending of a new status byte - a completely
> > > bewildering thing for the end user.
> > >
> > > I've recreated this issue on commercial synths, so it looks like I'm not
> > > alone with this - have any of you encountered this problem and have any
> > > ideas about an elegant way to deal with it?
> > >
> > > Cheers
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