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In Reply to: The art of building Computer Transports posted by cics on April 5, 2007 at 08:00:10:
Hi cics,Thank you for the post. Could you speak further about some of the points that I pulled out of your paper?
"Critical that one module is used. 2 x 512MB is bad. Multiple modules often cause blue screen crashes"
Why is it critical that a single module is used? Is it only to avoid the blue screen?"Remove all unnecessary cables within PC - no external USB connectivity hubs, firewire, and unnecessary sound cables."
Do the internal cables cause some sort of interference or do you suggest removing them to reduce clutter and help air flow?"Remove keyboard. Only connections should be the VGA cable and mouse (either system or USB)."
What affect does keeping a keyboard hooked up have?"Remove CD ROM Drive. Apart from high EMI, it uses IDE connectors. For CD ripping, use home computer and copy files via USB (stick or drive). For CD based software installations, connect CD Drive temporarily (and enable IDE Channels as described in BIOS setup)."
Does a DVD/CD drive still emit EMI when no CD is in the drive and it is not spinning? Just a note, SATA optical drives are becoming quite common."Select Shadow Setup. Disable Video BIOS Shadow"
Video BIOS Shadow copies the ROM to a normally hidden area of RAM and write protects that region. It allows for much faster access to the ROM code. How or why does disabling it improve sound quality?Also, can you speak to how or why setting lower latency in the sound card drivers achieves far superior results in sound quality?
Follow Ups:
Its been raised by Christine Tham as well - see comments.Basically: There is a connection between playback latency jitter (variations in latency) and transmitted digital audio jitter. I found that reducing playback latency helped in overall sound quality. Why this is so is not yet understood. You'll find many comments on ASIO being better than KS - playback latency drops with ASIO (assuming for KS, soundcard playback buffers weren't reduced).
You want to reduce video chipset to system memory traffic and free up precious memory in Windows. Adding more memory is a bad idea as more power is used (and of course this comes with added EMI/RF).
Yes, because power lines are active to your drive and some work is done. Also, IDE data bus and interface is prone to EMI/RF. Data bus acts like antenna.On optical SATA, I suspect similar problems will occur regarding power. SATA cables are shielded.
These cables add unwanted EMI/RF to computer. Most of these cables are not shielded and therefore act as antennas. Keyboard and things like USB hubs consume power (albeit little, every reduction helps).
Yes, to avoid blue screen crashes. Also, reduce power consumption & EMI/RF radiation - you get audible improvements.
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