Analogue-sequencer

Hi,

Just alerted to this this question...

> I recently got a P3 and it works great will most of my gear 
> except with my Virus TI2. When I hook the P3 directly up to 
> the TI2 it seems to miss notes, both note on and not off 
> messages. This is with a one midi cable going from midi out 
> of the P3 to the midi in of the virus and nothing else 
> connected at all. And it happens randomly, meaning it is not 
> always the same step note. If I enable all 16 notes, there 
> are more note misses than hits.

There could be a hardware incompatibility between the P3 output and Virus
input.
You can confirm whether it is a hardware or a software problem by connecting
the P3 to the MIDI in of a synth it drives without problem, then taking a
hardware MIDI thru connection from that synth to the Virus, and see if it
works OK.

The P3 MIDI output on earlier units uses an open-collector drive, which may
not having sufficiently sharp edges to drive the Virus input if its
sensitivity is marginal.
That can often be the case where designers have thrown in a heap of EMC
filtering to keep the digital crap inside the box.

If you find buffering the P3 MIDI output fixes the problem, you could add a
little dongle to the P3 MIDI output stage to sharpen it up.

Cheers,
Colin