Using GetSpectrumData

I've been using the GetSpectrumData method to try and "listen" for a couple beats that trigger at a specific time. So far I'm able to get the Unity project to react to notes but when I try and separate it and have only certain notes get picked up by GetSpectrumData I run into issues.

 void Update () {
             musicTrack.GetSpectrumData(this.samples,0,FFTWindow.BlackmanHarris);  
 
             for(int i=0; i<samples.Length;i++)  
             {  
                 Debug.Log(samples[i]);
                 if(samples[i] == spectrumData1)  
                 {  
                     Debug.Log("spectrum match");
                     foreach (GameObject thing in things) {
                         thing.SendMessage("DoThat");
                     }   
                     break;
                 }  
                 if(samples[i] == spectrumData2)  
                 {  
                     Debug.Log("spectrum match");
                     foreach (GameObject thing in things) {
                         thing.SendMessage("DoThat");
                     }   
                     break;
                 }  
                 if(samples[i] == spectrumData3)  
                 {  
                     Debug.Log("spectrum match");
                     foreach (GameObject thing in things) {
                         thing.SendMessage("DoThat");
                     }   
                     break;
                 }  
             }  

Even though the music track is just a couple beats I see wildly varying results when I print out the array of spectrum data. I was hoping that since it is just three notes that are three different frequencies that I could examine the spectrum data to see what the three "spectrums" I should have the program wait for but the numbers never show any kind of pattern.

Any help would be greatly appreciated!