Sync problems

jnesmith wrote on 1/13/2001, 10:15 PM
Hello, y'all.
I'm trying to sync my computer audio setup to my open reel
1/2" 8 track using a JLCooper PPS-2 Sync box. It
translates the SMPTE track into MTC which is fed into the
MIDI port of the soundcard. I'm using Vegas v1.0b, though
I have tried this with CoolEditPro with similarly
disappointing, albeit different, results.
Vegas can see the MTC and will record a track of audio.
Sometimes it will playback this new audio track just fine.
It doesn't always like to chase, it is more successful at
triggering playback. When I have it set to chase, it seems
to sync well for a split second before the playback rate
drops significantly, like the motor in a record player
losing power and slowly speeding up again. By the time it
has regained its speed, it's out of sync by about a 10th of
a second. When I have it set to trigger, this slowing-down
problem doesn't happen, but it's not always an accurate
trigger, and I can hear it losing time against the 8
track.
When I try to record a second track, things get really
exciting. I don't have 'simultaneous play & record' on,
but when I playback the two tracks with the tape they seem
to be permanently behind by a tenth to a half of a second,
and they're losing time against the 8 track even faster
than before.
So is it the processor? Is it the drive? Is it the
soundcard? The software? Is this possibly the result of
using the wrong kind of RAM?

Or will I have more luck syncing an ADAT to the 8 track?

Here's what I'm using:
Compaq Desktop 5461
AMD-K6 3D processor
248 MB ram
Gadget Labs Wave/824 soundcard
runnning in seperate hardware profile with as much
extraneous stuff turned off as I could find.
recording to secondary internal IDE 20gig UDMA drive, can't
remember the speed, but it was the fastest one available a
year ago.

I appreciate the help!
Jason

Comments

Rednroll wrote on 1/13/2001, 11:12 PM
The bad thing is that it could be any of those things in
the smpte signal path. The only problems I've had with
vegas syncing to smpte, is that it use to continually crash
on me. I think that problem was fixed in 1.0b though, I'm
using Vegas Video now and have no problems with smpte.
Usually what I do when I have smpte sync issues, I reverse
who's chasing. Have you tried having vegas generate MTC
and have your tape machine chase instead?

Jason NeSmith wrote:
>>Hello, y'all.
>>I'm trying to sync my computer audio setup to my open
reel
>>1/2" 8 track using a JLCooper PPS-2 Sync box. It
>>translates the SMPTE track into MTC which is fed into the
>>MIDI port of the soundcard. I'm using Vegas v1.0b,
though
>>I have tried this with CoolEditPro with similarly
>>disappointing, albeit different, results.
>>Vegas can see the MTC and will record a track of audio.
>>Sometimes it will playback this new audio track just
fine.
>>It doesn't always like to chase, it is more successful at
>>triggering playback. When I have it set to chase, it
seems
>>to sync well for a split second before the playback rate
>>drops significantly, like the motor in a record player
>>losing power and slowly speeding up again. By the time
it
>>has regained its speed, it's out of sync by about a 10th
of
>>a second. When I have it set to trigger, this slowing-
down
>>problem doesn't happen, but it's not always an accurate
>>trigger, and I can hear it losing time against the 8
>>track.
>>When I try to record a second track, things get really
>>exciting. I don't have 'simultaneous play & record' on,
>>but when I playback the two tracks with the tape they
seem
>>to be permanently behind by a tenth to a half of a
second,
>>and they're losing time against the 8 track even faster
>>than before.
>>So is it the processor? Is it the drive? Is it the
>>soundcard? The software? Is this possibly the result of
>>using the wrong kind of RAM?
>>
>>Or will I have more luck syncing an ADAT to the 8 track?
>>
>>Here's what I'm using:
>>Compaq Desktop 5461
>>AMD-K6 3D processor
>>248 MB ram
>>Gadget Labs Wave/824 soundcard
>>runnning in seperate hardware profile with as much
>>extraneous stuff turned off as I could find.
>>recording to secondary internal IDE 20gig UDMA drive,
can't
>>remember the speed, but it was the fastest one available
a
>>year ago.
>>
>>I appreciate the help!
>>Jason
jnesmith wrote on 1/15/2001, 8:33 PM
Having the analog 1/2" 8trk chase the sound card isn't an
option, unfortunately.

Brian Franz wrote:
>>The bad thing is that it could be any of those things in
>>the smpte signal path. The only problems I've had with
>>vegas syncing to smpte, is that it use to continually
crash
>>on me. I think that problem was fixed in 1.0b though,
I'm
>>using Vegas Video now and have no problems with smpte.
>>Usually what I do when I have smpte sync issues, I
reverse
>>who's chasing. Have you tried having vegas generate MTC
>>and have your tape machine chase instead?
>>
>>Jason NeSmith wrote:
>>>>Hello, y'all.
>>>>I'm trying to sync my computer audio setup to my open
>>reel
>>>>1/2" 8 track using a JLCooper PPS-2 Sync box. It
>>>>translates the SMPTE track into MTC which is fed into
the
>>>>MIDI port of the soundcard. I'm using Vegas v1.0b,
>>though
>>>>I have tried this with CoolEditPro with similarly
>>>>disappointing, albeit different, results.
>>>>Vegas can see the MTC and will record a track of
audio.
>>>>Sometimes it will playback this new audio track just
>>fine.
>>>>It doesn't always like to chase, it is more successful
at
>>>>triggering playback. When I have it set to chase, it
>>seems
>>>>to sync well for a split second before the playback
rate
>>>>drops significantly, like the motor in a record player
>>>>losing power and slowly speeding up again. By the time
>>it
>>>>has regained its speed, it's out of sync by about a
10th
>>of
>>>>a second. When I have it set to trigger, this slowing-
>>down
>>>>problem doesn't happen, but it's not always an accurate
>>>>trigger, and I can hear it losing time against the 8
>>>>track.
>>>>When I try to record a second track, things get really
>>>>exciting. I don't have 'simultaneous play & record'
on,
>>>>but when I playback the two tracks with the tape they
>>seem
>>>>to be permanently behind by a tenth to a half of a
>>second,
>>>>and they're losing time against the 8 track even faster
>>>>than before.
>>>>So is it the processor? Is it the drive? Is it the
>>>>soundcard? The software? Is this possibly the result
of
>>>>using the wrong kind of RAM?
>>>>
>>>>Or will I have more luck syncing an ADAT to the 8
track?
>>>>
>>>>Here's what I'm using:
>>>>Compaq Desktop 5461
>>>>AMD-K6 3D processor
>>>>248 MB ram
>>>>Gadget Labs Wave/824 soundcard
>>>>runnning in seperate hardware profile with as much
>>>>extraneous stuff turned off as I could find.
>>>>recording to secondary internal IDE 20gig UDMA drive,
>>can't
>>>>remember the speed, but it was the fastest one
available
>>a
>>>>year ago.
>>>>
>>>>I appreciate the help!
>>>>Jason
Rednroll wrote on 1/17/2001, 4:00 PM
Does your 1/2" chase? If it does then here's what you can
do. Record the 1/2 inch smpte that is stripped on the 1/2
inch to a track in Vegas. Route that to an audio output
after it's recorded. Patch that audio output into your
smpte input and have the 1/2 inch chase Vegas this way, so
you can lay off the tracks into Vegas. Or an even easier
way to do things is this. Before your song starts on the
1/2 inch arm all your tracks and record a click or beep on
all the tracks. ( something lick a click of a drumstick
or cowbell.) Now layoff all your tracks one at a time into
Vegas. Once they're in Vegas trim all tracks so they start
right at the click. Line up all the clicks of your tracks
and now all your tracks line up. Now go back and trim off
all the clicks. No sync is necessary to do a transfer this
way, and many professional studios use this method to
tranfers from studio to studio, so it works.

Jason NeSmith wrote:
>>Having the analog 1/2" 8trk chase the sound card isn't an
>>option, unfortunately.
>>
>>Brian Franz wrote:
>>>>The bad thing is that it could be any of those things
in
>>>>the smpte signal path. The only problems I've had with
>>>>vegas syncing to smpte, is that it use to continually
>>crash
>>>>on me. I think that problem was fixed in 1.0b though,
>>I'm
>>>>using Vegas Video now and have no problems with smpte.
>>>>Usually what I do when I have smpte sync issues, I
>>reverse
>>>>who's chasing. Have you tried having vegas generate
MTC
>>>>and have your tape machine chase instead?
>>>>
>>>>Jason NeSmith wrote:
>>>>>>Hello, y'all.
>>>>>>I'm trying to sync my computer audio setup to my open
>>>>reel
>>>>>>1/2" 8 track using a JLCooper PPS-2 Sync box. It
>>>>>>translates the SMPTE track into MTC which is fed into
>>the
>>>>>>MIDI port of the soundcard. I'm using Vegas v1.0b,
>>>>though
>>>>>>I have tried this with CoolEditPro with similarly
>>>>>>disappointing, albeit different, results.
>>>>>>Vegas can see the MTC and will record a track of
>>audio.
>>>>>>Sometimes it will playback this new audio track just
>>>>fine.
>>>>>>It doesn't always like to chase, it is more
successful
>>at
>>>>>>triggering playback. When I have it set to chase, it
>>>>seems
>>>>>>to sync well for a split second before the playback
>>rate
>>>>>>drops significantly, like the motor in a record
player
>>>>>>losing power and slowly speeding up again. By the
time
>>>>it
>>>>>>has regained its speed, it's out of sync by about a
>>10th
>>>>of
>>>>>>a second. When I have it set to trigger, this
slowing-
>>>>down
>>>>>>problem doesn't happen, but it's not always an
accurate
>>>>>>trigger, and I can hear it losing time against the 8
>>>>>>track.
>>>>>>When I try to record a second track, things get
really
>>>>>>exciting. I don't have 'simultaneous play & record'
>>on,
>>>>>>but when I playback the two tracks with the tape they
>>>>seem
>>>>>>to be permanently behind by a tenth to a half of a
>>>>second,
>>>>>>and they're losing time against the 8 track even
faster
>>>>>>than before.
>>>>>>So is it the processor? Is it the drive? Is it the
>>>>>>soundcard? The software? Is this possibly the
result
>>of
>>>>>>using the wrong kind of RAM?
>>>>>>
>>>>>>Or will I have more luck syncing an ADAT to the 8
>>track?
>>>>>>
>>>>>>Here's what I'm using:
>>>>>>Compaq Desktop 5461
>>>>>>AMD-K6 3D processor
>>>>>>248 MB ram
>>>>>>Gadget Labs Wave/824 soundcard
>>>>>>runnning in seperate hardware profile with as much
>>>>>>extraneous stuff turned off as I could find.
>>>>>>recording to secondary internal IDE 20gig UDMA drive,
>>>>can't
>>>>>>remember the speed, but it was the fastest one
>>available
>>>>a
>>>>>>year ago.
>>>>>>
>>>>>>I appreciate the help!
>>>>>>Jason