Re: Using QS7 with Voyetra DOP Pro

[ Follow Ups ] [ Post Message ] [ The QuadraSynth Forum ] [ FAQ ]

Posted by Markus Nentwig on March 04, 1999 at 01:23:26:

In Reply to: Using QS7 with Voyetra DOP Pro posted by Rick on March 03, 1999 at 20:17:29:

Hi Rick,
the problem you stated looks to me like the MIDI-transmission is not 100 % error-free.
This thing with notes sustaining indefinitely happens, when a note-off event gets garbled by a bit-error during transmission. So when you release a key the synth receives no note-off command then and the key stays turned on.
Also, I have experienced a similar thing: Notes would mutate sometimes to aftertouch (and anything else, if you look closely).

1) Check if there is an IRQ conflict with your MIDI card's MPU interrupt (easier said than done - the MIDI interface should use an own interrupt NR that no other device uses, if possible)
2) Try another cable (5 pin DIN to 15-pin Sub-D). There is cables that are DC-coupled and there is more expensive cables that are not (which use opto-couplers)
With the former, it is possible to get a ground-loop, also. Maybe try plugging PC and QS to the same wallsocket.
(I'm NOT suggesting to cover one ground pin of the power plug with adhesive tape, because it's dangerous ;-) and I don't think it would help much. )
And if nothing else helps: use another MIDI interface (you get them on an ISA card for a handful of $), but then disable the interface on your sound-card.


Follow Ups: