| Title: | * * Computer Music, MIDI, and Related Topics * * |
| Notice: | Conference has been write-locked. Use new version. |
| Moderator: | DYPSS1::SCHAFER |
| Created: | Thu Feb 20 1986 |
| Last Modified: | Mon Aug 29 1994 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 2852 |
| Total number of notes: | 33157 |
I'm really a bit confused about chase-locking.
In order for a sequencer to have even a fighting chance at doing
a chase-lock, it seems to me that it would have to start at the
beginning of the sequence and transmit every non-note message,
and then transmit the note on messages which didn't yet have a
comensurate note off at the time to which you want to chase.
Even with those things done, I can imagine many things that you
could have in your sequence/configuration which would break this
scheme.
I read a review in the latest MT which advertised a box which did
sync and ``Chase-Lock'' using a SMPTE type code on the tape, and
the Midi-Song position pointer. I don't really want one, but I'm
awfully curious what this beast actually does. They claim that it
takes several seconds to lock, so it must do something.
Thanks,
Steph
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 874.1 | No MIDI Songs Longer than 3 Minutes Allowed... | DRUMS::FEHSKENS | Fri Jul 17 1987 16:59 | 28 | |
I thought chase lock was a feature that allowed you to sync two
tape machines together to get more tracks.
I'm not sure what chase lock would mean with respect to a sequencer.
If you view a sequencer as just a different kind of multitrack recorder
(a defective analogy in my view, which gets you into trouble if
carried too far or mindlessly), I suppose it has some meaning.
Maybe this is just marketing word games.
What you've described sounds like tape sync and MIDI song position
pointer.
What is the intent? - to be able to start up a tape with a sync
track someplace in the middle and have the sequencer start at the
right place too?
Unless you were working on a piece that was continuously sequenced
for a *long* time, this seems like an awful lot of work (you've
already noted some of the problems) just to avoid starting the tape
from the beginning.
If it takes "several seconds" to lock, maybe all they're doing is
forcing the sequencer to send at some outrageous tempo, until it
gets "caught up" to where the tape is. Some sequencers might not
take kindly to such a scheme.
len (who admits to winging it).
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| 874.2 | SALSA::MOELLER | Fri Jul 17 1987 19:10 | 8 | ||
See one of the last replies posted by me in the topic 422,
'That Syncing Feeling'.
Chase locking for a sequencer does indeed imply that it's gotta
race thru the sequence up to the yes, SONG POSITION POINTER, in
order to have all patch changes and pitch bends, etc., resolved.
karl
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