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Topic: Support for Vista MMCSS (Read 3524 times) previous topic - next topic
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Support for Vista MMCSS

Are there any plans for foobar2000 to hook into Vista's Multimedia Class Scheduler Service? I really do love foobar2000, but it would be nice to be able to get clean playback when something decides to peg my processor which, alas, even a javascript heavy site, or some overly fast web browser scrolling, can achieve for a millisecond... and that's all it takes to ruin the audio experience

Support for Vista MMCSS

Reply #1 –
According to the linked article, MMCSS support is automatically provided to the multimedia APIs in Windows:
Quote
When a multimedia application begins playback, the multimedia APIs it uses call the MMCSS service to boost the priority of the playback thread into the realtime range, which covers priorities 16-31, for up to 8ms of every 10ms interval of the time, depending on how much CPU the playback thread requires.

Support for Vista MMCSS

Reply #2 –
What leads me to doubt this is that I can play track X in foobar2000 and cause stutter, while the same track in WMP does not. I also recall reading somewhere that programs need to register themselves.

I'd best check and return.
 

Support for Vista MMCSS

Reply #3 –
Quote from: Quitch on
What leads me to doubt this is that I can play track X in foobar2000 and cause stutter, while the same track in WMP does not. I also recall reading somewhere that programs need to register themselves.

I'd best check and return.

That sounds more like a problem with your foobar settings. Verify your output mode (and buffer amount), and your DSP chain as well.