A better way to lock to BPM?

This is BMAX code but applies right across the board so I though I'd post here.

I'm using the following code to calculate the BPM on the playing track, it's very accurate when there is a distinct bass drum but becomes erroneus when there is a Sub Bass Line going on. I know the issue is that I'm monitoring just a few frequencies (FFT) at the low end, perhaps I should be looking at mid range also for snares?

Any Ideas? better way to do it? (using bass.dll)

MAINLOOP
BASS_ChannelGetData(Music,Byte Ptr fft,BASS_DATA_FFT512)
DoBPM()
ENDMAINLOOP

Function DoBPM()

	If MilliSecs() - secsPrevious < 300 Then Return
	
	If IsBeat()
	  	secs = MilliSecs()
	  	If ((secs - secsPrevious) > 2000) Then Beatcount = 0
		
		If (Beatcount = 0 ) Then
			BPM = 0
		    	secsFirst = secs;
    			Beatcount = 1;
		Else
  		    BPM = 60000 * BeatCount / (secs - secsFirst);
		    BeatCount :+ 1
		EndIf
		secsPrevious = secs;
		Return
	EndIf
	
EndFunction

Function IsBeat()
	For Local f:Int = 0 To 10
		If (fft[f] > 0.6)
			Return True
		EndIf
	Next
	Return False
EndFunction

Perhaps using the bass_fx extension for bass which has bpm detection (and which seems to work fairly well)

Yeah, I'm not sure the methods are to dissimilar - after all there is only so much data you can use to determine what is a good beat.

OK, I guess I work too fast.

Thanks anyway - consider this thread/request closed.