AMD optimization

I am working for a company that delivers automated voice messages. Our main use of the asterisk is for speech recognition. We would like to optimize our system and are currently using the settings AMD(3500, 2000, 800, 6000, 100, 50, 4, 512). Is there anything that can be changed directly which would make our system better? How can we test that our new values are better? Is there a program to test these new values against so that we don´t have to call people up and make statistics on it?
Kind regards Elliot