Syncing Trouble-Shooting - M-Audio Portman 4x4 Manual

SYMPTOM: My keyboard shows "MIDI Data Error," or "MIDI
Buffer Full".
SOLUTION: Check your MIDI cables and MIDI connections. Be
sure the cables are plugged in all the way. If the problem persists
try new cables.
SYMPTOM: MIDI is being sent and received properly but when
I play my sequencer it lags and bogs down.
SOLUTION: First, make sure you don't have a MIDI feedback
loop. A MIDI feedback loop can occur if the MIDI Out of the inter-
face card is somehow connected back to the MIDI In through
some external device. This can be avoided by turning off the MIDI
Thru on either your keyboard or in the application software.
SYMPTOM: Several MIDI inputs are merged to one or more of
the MIDI outputs. Whenever long Sys Ex (System Exclusive)
messages come in one port, I get stuck or delayed notes on one or
more of the output ports.
SOLUTION: This is a problem that all mergers have and it is due
to the fact that a Sys Ex message can never be interrupted by note
on/off messages (or other controller messages for that matter).
Once a Sys Ex message begins, all other incoming messages will
have to wait their turn before merging into the output stream. If
you experience stuck notes or controllers while performing Sys Ex
operations, press the RESET button on the front of the PORTMAN
4x4/S. This will transmit Note off and controller reset messages
on all 4 MIDI outs.
SYMPTOM: I'm a programmer and want to program for the
card. Do you have any programming information for the card?
SOLUTION: Contact MIDIMAN by mail, phone, or fax, or con-
tact the MIDIMAN BBS at 626-445-8549 for additional program-
ming information.

Syncing Trouble-Shooting

If you are having trouble syncing to SMPTE you should check the
following:
Are you using a high quality tape deck and tape? Have you tried
using a higher quality Metal or Chrome Tape?
Do you have the PORTMAN 4x4/S SMPTE In connected to the
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