Making or getting a rotating stand with strong control over rpm

flybynight420

I require for a project a rotating stand, much like these... http://www.cokerexpo.co.uk/rotating-display-stand.htm ... Which are used in shops

However as you can see they have some preset rotation speeds which have nothing like the accuracy that I will require. I need to control the speed of rotation down to the second e.g. 9 rotations in one minute.

If there is something off the shelf that I can get that would be perfect. I don't know if there is something that could link to computer software.

I am way out of my depth on this stuff - I am a musician and not an engineer, but am willing to put some work into this to get it to work. I can program quite well, so if there are programs that can control hardware that is an option.

Many thanks for any help :)