Parallels 4 audio skipping/jerky playback with vista x64

D

dontdo_that

Junior Member
I searched and found a few topics discussing issues with Parallels 2 and 3 and Vista, where audio/ video playback would be jerky, or have stuttering/skipping, similar to listening to a person speak with an intermittently operating microphone. No solutions were posted in any of these topics, and I have not been able to find any further information for Parallels 4., but this is the exact problem I am experiencing. I was wondering if a solution has been posted anywhere?

MBP early 08, C2D 2.5, 4GB 4-4-4-12 Gskill 667mhz, 8600m 512mb. Vista home premium x64 and osx leopard 10.5.5.

Thanks!!
 
1. Minimize hardware acceleration level in display properties.

Right click on Desktop -> Personalize -> Display Settings -> Advanced
Settings -> Trobleshoot tab. Put hardware acceleration level to zero.

2. Set Color in Display Settings to 24 bit making hardware acceleration
set to maximum.
 
Hi John, thank you for your reply.

Unfortunately this didn't solve the problem. I set hardware acceleration to NONE in the troubleshooting tab. In the display settings, it was originally set to 32bit (highest), and i turned it down to 24bit like you said. I also tried it on 32bit, to no avail.

Any other known solutions? Thank you for your help
 
Winamp and Napster. My testing has been as follows, with the same skipping playback for all testing scenarios:

Winamp: Play file on external hard disk connected via firewire 800 and USB 2.0
Play file on MAC OSX networked drive

Napster: streaming

Youtube also has a little bit of skipping. The skipping also exists in VMWare Fusion (although that's irrelevant on a parallels forum)... i really hope its not a hardware issue..

I can also try VLC Media player. I have yet to try WMP or Quicktime.
 
For quicktime
Enable video overlay for Virtual machine
- Shutdown VM
- Open VM Configuration
- Select CPU settings
- Check Advanced settings checkbox at the bottom, System flags text
field will show up.
- Type in "video.overlay_noflip=1" without quotes into System flags
- Click OK and start the VM






Note
1.This option may affect Windows Media Player playback
(that is why it is disabled)
2. Option will work for QuickTIme playback only in Window and Full Screen mode
3. In Coherence we do not support video overlay at all, so it will not help in Coherence mode
 
Hello John,

Thanks for your continued support. This does not solve my issue of jerky/stuttering audio in Parallels. My primary reason for wanting to play audio through Parallels is Napster, since Napster does not offer an OSX client. Is stuttering/skipping audio a known problem with Parallels 4 and Vista x64? I haven't been able to find any information on this issue.
 
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