DOS ain't dead

Hello, everyone! From what I remember there existed a DOS tool for slowing down the CDROM's rotational velocity. This has the benefit of less wear and noise. Can anybody recall such tool? I used to have it, but lost it and forgot its name... I think it was written by a Russian author, but there may exist equivalent programs.

Yes, I still use it in my MP3 player jukebox, here's it:
cdspeed 1.1

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DOS gives me freedom to unlimited HW access.