Octave Calculation

[djclueveli]

Is there a way to calculate which frequency the Set Q number will raise or boost. (e.g. say if i set the Q to 1 and started to boost at a certain frequency, is there a formula to use to know which frequencies will raise?)

 

[TexRoadkill]

Q = (center frequency)/((high frequency 3dB down point) - (low frequency 3dB down point))

1= 1000hz/(1500hz-500hz)

 

[djclueveli]

i dont get it lol. exlain it a different way please

 

[Ford Van]

This converter seems to be about right.

http://www.sengpielaudio.com/calculator-bandwidth.htm

In the "quality factor Q", enter a number, and hit calculate. That will show the bandwith in octaves.

.3 came out to 3.7 octaves, and 1.5 came out to .95 octaves. That seems right.

 

[SonicAlbert]

Why do you want to calculate it this way, other than curiousity? This is something that is not done mathematically, but by using your ears.

When you set the frequency, that center frequency is the one that will be raised and lowered most, with the surrounding frequencies affected less the further you get away from the center. The "Q" determines how much the surrounding frequencies are affected, in other words how fast the eq boost/cut falls off around the center frequency. An narrow bandwidth will affect mostly the center frequency, and a wide bandwidth will gently taper in both directions.