Decimation problem :(

Hello All;

Well now that I got the audio source working I have another problem.

The sample rate of the audio source is set to 96K (so that I can sample
40KHz signal).

I have a frequency counter connected across my source, so I know what
actual frequency is.

When I add or change the decimation in either a band-pass filter or FIR
filter block it affects the

Frequency scale of the FFT block.

I found that I needed decimation in order to make the flow graph work

Is there some parameter I can change in the FFT block to compensate for
effect of the decimation ??

Or is there some other method of introducing decimation between the
and the FFT block ??

Thanks Again .