It was TrueRTA that I was using.....echo.....echo.....echo.....

It seems to be pretty darned good. For analysis with 1/24th octave resolution you need the $99.99 version, but I think it's money very well spent. My only wish list would be for it to have a comparison function where you could subtract one set of measurements from another, and also that you could save the screenshot as-is so you could look at the graph later. It does have an "export" function but this is a listing of numbers for each frequency and the level at that point. Not very easy to compare with other data, especially if the absolute level is lower or higher between the two charts

[This message has been edited by soundhound (edited August 16, 2003).]