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Question : Problem: Video & audio stutters when playing back movies
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I recently built my own computer for home digital audio work and home office applications. Everything works great, however, I'm having some issues playing back movies and audio. The audio is hanging and skipping whenever the disk activity light comes on. It's driving me nuts. I've tried the same songs & videos on other computers and they play back fine, so I know it's not a problem with the files. Here are my specs
Motherboard - A7S333 (Sis745 Chipset, onboard audio jumper disabled)
CPU-AMD Athlon XP 2200+ 1.8 Ghz
Memory-Samsung 512MB
Hard Drive-Two 40GB Seagate Barracudas (ATA100 7200RPM)
OS-Windows XP Home 2002 (Service Pack 1)
Video Card- Matrox Dual Head G450
Sound Card-Delta 44 (5.10.00.0027 drivers (not digitally signed for XP))
disabled ACPI
disabled onboard audio with mobo jumper and in BIOS
no virus scanning software
Display Properties:
Power Scheme:
Always On
Never turn off monitor
Never turn off hard disks
Appearance:
Windows Classic Style
No wallpaper
Display Settings:
Screen Res 1280 x 1024 (this is the only resolution that is crisp on my monitor)
Color Quality: medium (16 bit)
Advanced:
Video Hardware acceleration:None
System Settings:
Performance:
Custom Visual Effects:everything disabled
Processor Scheduling:Background services
Virtual Memory: Initial: 1024MB for each drive
Automatic Updates disabled
System Restore disabled for all drives
Device Manager:No Conflicts, No IRQ's shared
Changed to Standard PC
Disabled onboard audio
Sound & Audio Devices Properties
No sound scheme
Sound playback: M-Audio Delta 44 Multichannel
Sound Recording: M-Audio Delta 44 Multichannel
MIDI Music Playback: Microsoft GS Wavetable SW Synth
Voice Playback: M-Audio Delta 44 1/2
Voice Recording: M-Audio Delta 44 Multichannel
Delta 44 Control Panel
Disabled "Reset Rate When Idle"
DMA buffer: experimented with every setting, currently on 384 samples
Use windows default for MME is not checked
Current Sound, Video, Game Controllers listed:
Audio Codecs
Legacy Audio Drivers
Legacy Video Capture Devices
M-Audio Delta 44
Media Control Devices
Roland PC-300 USB Driver (my MIDI keyboard)
Roland UM-1 USB Driver
Video Codecs
IRQ's
0 System Timer
1 PC/AT Enhanced PS/2 Keyboard
4 Communications Port
6 Standard floppy disk controller
8 System CMOS/real time clock
12 Microsoft PS/2 Mouse
13 Numeric data processor
14 Primary IDE Channel
15 Secondary IDE Channel
3 M-Audio Delta 44
3 SiS 7001 PCI to USB Open Host Controller 5 SiS 7001 PCI to USB Open Host Controller
10 Realtek Ethernet NIC
11 Matrox Millennium G450 DualHead (originally had a ATI Radeon 7500, replacing video card had no effect on my video problems)
You actually read this far! I appreciate any help since I haven't gotten any sleep in weeks!
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Answer : Problem: Video & audio stutters when playing back movies
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It sure sounds like a sharing thing. Let's go back to 5thcav's suggestions about DMA. See WindowsXP will set all of your ATAPI devices (aka your dual Seagate Barracudas) to use PIO mode by default. This is VERY CPU intensive so you'll want to change it if possible. To do so, do the following:
1. Open the System Properties dialog and select the Hardware tab.
2. Click the Device Manager button.
3. Expand the entry for IDE/ATAPI controllers.
4. Select the primary channel and click on Properties, and then choose the Advanced Settings tab.
5. For each device listed, change the transfer mode to "DMA if possible." Don't worry - devices that aren't capable of DMA mode will still work just fine.
6. Repeat the process for the secondary channel.
Read this article and see if any of it helps out:
http://www.extremetech.com/article2/0,3973,17085,00.asp
Again... Good Luck!
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