V6c Major audio recording issue!!

bakerja wrote on 9/30/2005, 12:34 PM

I have a multitrack audio only project that consists of live recordings of an hour long concert. It contains approximately 6 stereo tracks and about 8 or 9 mono tracks. I started overdubs last night and right off the bat noticed sync jumping. At first I was unsure if it was just bad tempo by the artists, but as it progressed, it was unmistakenly clock issues. While recording one track and playing back the others, sync would not hold and you would hear a slight jump in tempo every now and then. If you play back the newly recorded track, it has pops at precisely the same point on the timeline as you hear the clock jump.

My first thought was, too many tracks at once, or too many plugins, etc. So I rendered the multitrack project to a 2 mix to see if it could handle playing back 1 stereo track while recording a mono track. I got virtually the same results. pops, jumps, etc. After about an hour of killing windows processes and everthing that I could think of, I decided to go back to Vegas 5. (I had not uninstalled thank goodness! ) Vegas 5 rocked as solid as it always had in the past. Even with the entire multitrack .veg playing (16 tracks total) I could record a new track with no pops or jumps in clock.

Any ideas what might be causing this? This sounds like something that Sony should know about don't you think? I have never escalated issues beyond this forum but wonder if I should bring this to their attention?

Thanks,
JAB

Comments

bakerja wrote on 9/30/2005, 12:36 PM

I have not uninstalled V6c and gone back to V6b to determine if it is a 6c issue yet. Maybe I will do that tonight but would love to hear feedback from others first.

Thanks,
JAB

B.Verlik wrote on 9/30/2005, 1:12 PM

I can't answer specifically for Vegas 6.0c as I'm on 4.0e, but the one thing I discovered a while back is, whenever you record new tracks and add them to a video project, for some reason the sync is out when you play them back. (Like if I "Sound with sound" record along with the video track.)
Try going into you project properties (Icon on far left, above video preview window) and switching the "ruler" tab from "Time & Frames" to one of the "SMPTE 29.97" ones. This may change the way things are set up on the timeline a little (your titles may default to 4:29 secs instead of 5 seconds). This will not necessarily correct what you've done, but you may be able to adjust it to work.
I discovered that if you record audio tracks along with (in time with) the existing video track, this is what kept everything in sync for me. It's just easier if the timecode is on one of the 'SMPTE 29.97' ones first. When you record new audio projects, sometimes the timecode reverts back to "TIme & Frames" without warning. So you have to check periodically.
PS, I'm the only person I've ever seen state this, and I'm certainly no real expert. But when I want to add new sound to an existing video, in real time, and have them be in sync as I'm making it and playing it back, this is what worked for me. (Technically, the live audio is slightly out of sync due to latency/soundcard problems, but I mute that track as I record it and it's in time on playback.)

bakerja wrote on 9/30/2005, 1:15 PM

This is an audio only project. No video

Thanks,
JAB

B.Verlik wrote on 9/30/2005, 1:21 PM

Right in the first sentence. Isn't skimming wonderful. Jeeez. ( what can I say, this is a video forum) All that for nothing. Well, if worse comes to worse, try it anyway.

bakerja wrote on 10/2/2005, 12:01 AM

Any other ideas guys?

This is really a huge problem. Is anyone else doing multitrack audio projects such as this?

Thanks,
JAB

Ben wrote on 10/2/2005, 4:23 AM

Firstly, what audio driver model are you using? If you're not using ASIO, try that.

Secondly, go to the audio forum here. It's unfortunately quiet these days so if you have no luck try www.crossfade-forums.net, which is where many of the former audio forum guys hang out.

We can then try going through some possibilities and trouble-shoot. Many of us do multitrack audio on Vegas (that's all we do with it!) with no sync issues.

HTH,

Ben

bakerja wrote on 10/3/2005, 9:39 AM

Thanks Ben,

I am using ASIO drivers only. vegas 5 will do the job quite nicely so it looks to me like a version 6 issue. I was hoping that other multitrack users on version 6c could chime in and let me know if they are having any problems.

Like I said previously, the problem is only evident when a track is recording while playing back other track(s).

Thanks,
JAB

Spot|DSE wrote on 10/3/2005, 10:05 AM

Not having problems here at all. We just finished doing the tour promos for "Chorus Line" and that was all recorded to 16 tracks in Vegas on a laptop, using 2 Echo Layla's, with playback simultaneous for the dancers to monitor during the recording.
We use the ASIO drivers, buffers set to default, only compressors on the track. Do you have other plugs on the input track? You might try removing all plugs on the tracks. If you've got a slower proc, and you've got plugs, that alone could cause significant probs at record. Either bypass them or remove them.

Jameson_Prod wrote on 10/3/2005, 11:47 AM

Don't want to insult your inteligence.....but are your settings all the same? Sample Rate, bit rate, etc. I've done many audio projects with Vegas and had no problems. I just finished doing a demo for a local band with as many as 24 tracks...with over dubs and punch ins. No problem.

Good luck.

bakerja wrote on 10/3/2005, 2:25 PM

Thanks for the suggestions,

It doesn't seem to be processor related. I rendered the entire project to a stereo track with no plugs and it still does it. Simply playing one stereo 48ktrack and trying to record one mono 48k track. All prefs are the same in V5 as in V6 but the V5 project works. I'm going to go through it with a fine tooth comb this evening and see if I can spot something that I have overlooked.

I am recording SPDIF in. I will try analog also to see if that may be the issue but you would think that if it were a digital clock input issue, it would be the same issue in v5 as v6.

Thanks,
JAB

farss wrote on 10/3/2005, 2:45 PM

How is the SPDIF in being clocked?
I have had major issues with this but they were not really Vegas issues as, just me not watching what I was doing.
To record from SPDIF you need to be externally clocked but if you're playing back as well, I don't know a bout that one.
Bob.

bakerja wrote on 10/4/2005, 1:23 PM

Did a ASIO driver update last night. Screwed everything up! Went back and re-installed old ASIO drivers and did a quick test and it seems to be working normally now. Maybe it was a driver issue? It just seems weird that Vegas5 worked fine and Vegas6 was not working. I do hope that was all it was.

Thanks for the suggestions,
JAB