thanks you but
there is?
what is it?
I may use it useful for other appropriate purpose


(Scott Dorsey) wrote in message ...
bj wrote:

Is there a spectrum analysis apps or plug-in ,which compare A with B
and then compensate B for A by auto frequncy gap equalizing?

There is, but it will not help you. The differences between the cheap
preamp and the good preamp are much more significant than just the
frequency response.
--scott