Emu XL-7 & MP-7 User's Group

So wait, creating an intentional MIDI loop is a bug in the XL-7? 
Hardly!  If you create a MIDI loop, every single product on the market
will do MIDI loop things.  If there is a bug (other than in your setup)
it's the fact that MOTU (I'm presuming that's what you have) patchbays
don't route realtime messages, they multicast them.  It's intentional
on their part, but it's really annoying.

Anyway, the solution is don't merge in to out, and filter reception of
start/stop on devices you don't want to recieve it.

Happy holidays,
  -Aaron

--- Zsolt Szabo <Zsolt.Szabo@...> wrote:

> Hi !
> 
> XL7, OS 2.0.
> Connect both in/out to a MIDI interface or patchbay which doesn't
> have
> the MIDI realtime msgs filtered. Enable "Merge MIDI In to Out" on the
> XL7, it doesn't matter which out port, A or B which is even more
> weird
> than what happens next. Start XL7 by pressing PLAY. Now XL7 will
> nicely
> transmit MIDI Start message. If the MIDI interface transmits it back
> to
> the XL7's MIDI In port a nasty MIDI loop will occur which will kill
> the
> XL7 in approx. 10 seconds. Complete freeze. If you are quick enough
> to
> pull the cable the XL7 is able to cope with it (buffer size big
> enough
> to hold approx. 8-10 seconds worth of MIDI msgs ?)
> 
> 100% percent reproduceable.
> Workaround - filter the outgoing MIDI realtime on the MIDI
> interface/patchbay towards the XL7's MIDI In. Keep an eye on
> it in live situations - I learnt it the hard way ...
> 
> Regards:
>      Zsolt

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