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Windows 7: DPC Latency & sound dropouts

30 May 2012   #11
YAJones

Windows 7 Home Premium 64 bit
 
 

Yea I already had most of those optimizations done. Still experienced the latency/dropout issues.

Thanks for your help though.


My System SpecsSystem Spec
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31 May 2012   #12
fireberd

Windows 7/10 64 bit
 
 

Here is some more info from Avid (Maudio/Pro Tools)

Windows Guide - Windows 7 Optimizations and Troubleshooting.
My System SpecsSystem Spec
04 Jan 2013   #13
sachink70

Windows 7 Ultimate x64
 
 
Reducing the dpc latency

well friends I also tried many things but what I think worked is as follows

1. I removed all audio and midi drivers from device manager
2. disabled serial port , parellel port, hpet, and onboard audio
3. As I was using firewire card (pci via ), I changed the IRQ of pci slot 1 to 4 and pci slot 2 to 9
4. Disabled all speed step, boost virtualization, hiper threading, power saving in bios
5. Rebooted the pc.

Shut down the pc and inserted pci firewire card and then started

then onwards my dpc latency shown negligible
later i enabled the onboard audio.. and installed audio midi drivers still all perfect
My System SpecsSystem Spec
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04 Jan 2013   #14
fireberd

Windows 7/10 64 bit
 
 

According to Focusrite, the "legacy" firewire driver should be used in Vista/Win 7. I don't know if that will affect latency but improves firewire device operation.
My System SpecsSystem Spec
04 Jan 2013   #15
neo101

WIN7 Ultimate 64bit
 
 

Quote   Quote: Originally Posted by sachink70 View Post
well friends I also tried many things but what I think worked is as follows

1. I removed all audio and midi drivers from device manager
2. disabled serial port , parellel port, hpet, and onboard audio
3. As I was using firewire card (pci via ), I changed the IRQ of pci slot 1 to 4 and pci slot 2 to 9
4. Disabled all speed step, boost virtualization, hiper threading, power saving in bios
5. Rebooted the pc.

Shut down the pc and inserted pci firewire card and then started

then onwards my dpc latency shown negligible
later i enabled the onboard audio.. and installed audio midi drivers still all perfect
Good for you - you did yer research too on latency and stuff.

In my experience when you remove the drivers for reinstall
Use special software tools that hunt out all leftovers.
Then a good registry cleaner.

After reinstall - reboot between each driver to settle the order in properly.
If you have a problem still

clear computer properly of driver leftovers/registry fluff
Then install in a different order/reboot between each install

Still have a problem - use different version drivers.

Drivers chipset/sound/lan/firewire/wireless/anti virus progs
- usual culprits

Quite often in past M/S updates used to affect drivers.
So you have to be aware of them - till they fix it.
My System SpecsSystem Spec
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 DPC Latency & sound dropouts




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