M-Audio Portman 4x4, Руководство пользователя

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proper Tape Out/Sync Out port of your deck?
Are your SMPTE audio cables good?
Have you discovered the best Input and Output level settings on
your tape deck? You may need to spend some time playing with
different playback and record levels to find the best and most reli-
able settings. If the signal is too hot or too low during record or
playback you may encounter problems. You should play with the
record and playback levels until you get reliable sync. We have
found that a level of around 10 dB is best.
A SMPTE stripe is essentially data recorded to tape. If your
recorder uses noise reduction, such as DBX or Dolby, when writ-
ing or reading SMPTE, the data may be corrupted and the results
may be unacceptable. We recommend that you do NOT use noise
reduction when recording or playing a SMPTE sync track.
If you are recording any kind of a sync stripe and going through a
mixing board to set levels, make sure any EQ is off or flat. If you
EQ a SMPTE signal it may turn to mush.
Are you trying to use SMPTE mode with a sequencer that does
not support MTC or is not set to chase to MIDI Time Code?
With all sequencers you must set a SMPTE song/sequence start
time. Make sure you set this SMPTE start time to a value at least a
couple seconds later than what your SMPTE stripe starts at. For
example, if you recorded a SMPTE stripe starting at 1 hour
(01:00:00:00), you should set your sequencer start time to some-
thing like 1 hour and 5 seconds (01:00:05:00).
Make sure your sequencer is set to receive MTC on the Windows
driver which has MIDI Time Code coming over it. This driver is
called “SMPTE/Status - PORTMAN 4x4/S”.
If the SMPTE can be heard on neighboring tracks (i.e. there is
cross-talk), then try striping the tape at a lower level. The PORT-
MAN 4x4/S SMPTE waveform is specially designed to limit
cross-talk (per the SMPTE specification). However, if it is record-
ed “too hot”, the signal could bleed into other tracks just as any
other audio signal could.