Dvdspeedcontrol -

A DVD doesn’t spin at a constant rate. Optical disc drives use two primary strategies:

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If you are looking to implement DVDSpeedControl today, follow these general best practices: A DVD doesn’t spin at a constant rate

: Be aware that forcing a very low speed on a damaged or scratched disc may cause playback stuttering or read errors. DVDSpeedControl

: Click the "Apply" or "Set" button. The drive will spin down immediately if a disc is currently spinning. dvdspeedcontrol.software.informer.com Common Alternatives & Related Tools

Some cheaper PC cases would literally resonate like a tuning fork at max RPM. Slowing the drive stopped the rattle.