ASIO Drivers cause video to race ahead?

Maestro wrote on 4/20/2006, 3:44 PM

Interesting, so I'm just seeing if anyone else has come across this:

I've been using Vegas 6 since it was released, and just recently upgraded my computer to a dual Opteron 285 beast. I started using the ASIO drivers for my sound card, and it ran just fine with no problems for about a month. Then, just today, I noticed that my frame rates were dropping to about 22-25fps, even with an empty timeline. Put a DV avi file on the timeline, same thing. Put an avi file on the timeline with no audio, same thing. What I found out was that the video frame rates were lagging because Vegas was playing the video file at about 1.3 normal speed, even though the audio was playing perfectly. The end effect of this most comical but frustrating thing was that the timeline marker would go past the end of all the timeline events, but the audio would continue playing (because the video was sped up, the timeline marker was also going faster than normal). Turn on the Windows Classic Wave Driver and everything now works as expected.

I'm just passing the bean bag around here, but has anyone else experienced this Twilight Zone event? Is the solution really to just stop using the ASIO drivers? Do they just suck or what?

Thanks folks,

-Brent

Comments

Zion wrote on 4/20/2006, 3:58 PM

Maestro

Check your sample rate "44.1 48.KHz " and make sure they Match with Vegas Project Properties. Also Check the clock source of you audio card. (Word Clock, SPIDF, Internal, TDIF Ect.) Check in the ASIO control panel.

I use the ASIO drivers with Vegas 6.0d with no problem.

What Audio Card Are You Using?

ZION

Maestro wrote on 4/20/2006, 4:03 PM

Yup, sample rates match and the clock doesn't apply in this case. Again, this just started happening this morning on projects and rendered avi files that had been working fine for a month. And also, if I open Vegas with an empty project, no events, nothing in the media pool, and then start playback, I'll see the framerate drop to 25fps, even though it's playing no video or audio files.

Project properties are set to 48K, because that's all the ASIO driver will allow. I'm using a Creative Audigy 2 Platinum Pro.

Thanks for the reply!

Zion wrote on 4/20/2006, 4:08 PM

Maestro

What are your Audio Device setting in preference?

And when using ASIO what is your latancey in milliseconds? You can check this in the advance tab.

ZION

Maestro wrote on 4/20/2006, 4:12 PM

Device was: SB Audigy 2 ZS ASIO [2000]

Latency was 200ms. Anything lower than that would pop or skip during multitrack playback. If I turned that down to say 10, it would make the framerate go up, but the pops and stutters were unbearable.

Zion wrote on 4/20/2006, 4:18 PM

Maestro

Thats pretty high Latency. I run My card at about 5 to 10ms.

Thats a good place to start and see why you have to run so high.

ZION

DJPadre wrote on 4/20/2006, 6:59 PM

one ting with mixed sample rates in mp3 format in a 48k project, is that when scrubbing, u may get into some difficulties or lock ups... its not Vegas, its the Creative card. As good as they are, ive quite afew major crashes requireing a forced power down and reboot.

IN all, i woul drecommend ur run wav files for any audio source...

BrianStanding wrote on 4/20/2006, 7:15 PM

I don't know if this is related, but I've never been able to keep Video and Audio preview in synch when using ASIO drivers. I use WDM drivers only and everything's fine.

Maestro wrote on 4/20/2006, 10:42 PM

Yes, it's seeming more and more like I'll either need to stick with WDM drivers or get an m-audio or echo card. I've had three blue screens in the last year, all of which were because of the Creative driver.

As a followup, I updated my drivers to the latest Creative had to offer (although I'm reasonably sure that's what I already had), and the problem went away. But I'll still get occasional pops/skips/clicks in playback when listening to a lot of audio tracks, say 12.

Does anyone have a testimonial that switching from a Creative card to an m-audio or Echo resulted in a more stable system and/or better ASIO support? I rarely use the card for recording, and when I do it's only two tracks from a cassette recorder. I'm more interested in playback stability and quality.

Thanks everyone!

BrianStanding wrote on 4/21/2006, 4:21 AM

I had an old Soundblaster that gave me nothing but problems. Switched to an Echo Mia and everything's been clear sailing since.

I use Echo's "Pure Wave" WDM drivers whenever I'm previewing video to keep it in sync. I switch to ASIO on the rare occasions I'm doing multi-track recording and need low-latency monitoring.