Want to decrease idle speed on ad-7670s

My Optiarc ad-7670s is very noisy when he is supposed to do nothing … In play mode it works fine . Is it possible to decrease somehow the idle speed ? I’m using it in an audio player so it’s important to be silent. Thank you.

Nope, no way to change that which I know of.

Thanks. I thought is possible since the write speed could be modified through firmware…