Multisim Transient Analysis Stepsize Issue

[conxion]

Hi All,

I have a 32 second wav file that has a 1 kHz noise on it. I am trying to design a simple circuit that will remove this noise.
I am having problems with the output of the transient analysis of multisim. I have more data points that original. Here are all my steps.

Convert wav file into time domain in MATLAB with
-wavread
Save the time domain data to a txt file with matlab. This data has 1,424,800 points.
Design a notch filter with multisim. Input the data with a piecewise linear voltage source that is linked to the text file.
AC analysis of my circuit reveals that it should work, -30 dB gain at 1 kHz.

Run a transient analysis with multisim. Import the results into .tdm then into Matlab with
**broken link removed**

Here is where my problem is. The output of multisim has 6,396,188 data points instead of 1,424,800. When I use wavwrite and create a new wavfile, it is 2 minutes long instead of 32 seconds like the original.

I believe my problem is the step size settings of multisim. I want to specify minimum step size but multisim does not have that option.

Any suggestions?

Thanks