Timing Glitches when Audio Armed

  • Thread starter Thread starter Tripecac
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Tripecac

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I'm using Sonar 2.1, a Delta44 for audio, and a Frontier WaveCenter PCI for MIDI, all on 98SE.

MIDI playback and recording is fine. It's stable, never hiccups.
As soon as I arm an audio track, however, playback gets erratic.

DETAILS:
- playback tempo jumps around, especially within the first couple seconds
- it continues to be erratic, as long as an audio track is armed (for recording)
- as soon as I disarm the audio track, the jumping stops (midi by itself is smooth)
- if I set the sync to "Internal", the jumping goes away (but the resulting recording speeds up and has bad glitches, so I like to keep it set to "Audio")
- changing the playback/recording master from the delta44 to the wavecenter card doesn't help
- if i disable the midi drivers, i still get erratic audio
- changing the audio latency in Sonar and/or the Delta does not help
- changing buffer sizes does not help

- i didn't have problems like this with Sonar 2.2, but I *did* have blue-screen crashes, which is what prompted me to revert to 2.1
- ASIO drivers help, but I can't use them with Sonar 2.1 (only MME-16 bit)

Any ideas on how I can get the audio to playback and record smoothly?

Thanks!

Travis
 
Last edited:
Unfortunately, I think it's pointing to your PC running out of juice.

Also - as you are using two different cards - one for audio, one for midi, I think that irregardless of which card you use as a clock source, the timing will wander on longer tracks.

Instead of using the internal sound of either and trying to chase back to a time source, can you set the sync to internal, bounce the midi tracks to audio and then record your additional audio tracks? That way you will always be synching audio to audio and may assist.

That's the only workaround that I can think of.

You are in a chicken and egg scenario - you need 2.2 to make ASIO drivers work. You need the ASIO drivers to work so that you get fast enough operation of the audio card. You can't use 2.2, so you can't use ASIO. Your other alternative is to use XP or 2000 so you can use the Delta's WDM drivers, but you maintain elsewhere that you don't have enough RAM to drive it.

Unfortunately, it looks like it's time to hit the piggy bank with the hammer is you want to play with all the bells and whistles.......

:( Q.

I presume you have tried the following -

- Disable screensavers and windows backdrops
- Disabled Windows sound schemes
- Set NOTHING as the default Windows sound card
- Backed up and deleted the AUD.INI file and reprofiled the card
- Updated both the Delta and the Frontier to the latest driver revs.
 
Good news!

Reverting the Delta's audio drivers to an older version seems to have worked!

bad: 4.13.01.0047
good: 4.13.01.0041

I don't get the audio jitter any more. :)

Travis
 
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