What chart is that called?

[M2E]

Hey Fellas,

What chart is that called when you know the key of the song and you want to add those freq. to your mix to bring it out?. Also where can I find those charts?

Thanx
M2E

[kaipiranha]

Hm. Do you mean something like this?

http://www.cranesong.com/IBIS%20FREQUENCY%20CHART.html

Kai

[halcyo]

excuse me for being uninformed, but what is this chart used for? Is it just explaining the frequencies for all the harmonics of a given note?

halcyo

[Jules]

The producer Tony Visconti is on record for saying he uses those sorts of charts to find frequencys to boost on bass in the dominant key of the tune...

I keep meaning to try it out myself....

[thenewyear]

no this chart just shows the fundamentals freqs of pretty much every note we can hear in equal temperament.

you could use it to work out harmonics so long as you know the harmonic series.

it looks like a useful EQ tool. i will be printing & trying it out.

[LTA]

You can also convert these charts into feet or ms, and use that to create comb filtering.

I'm not going to get into how harmonics work and all, but i'm going to give you an example.

A guitar is in standard EADGBE tuning. You want to slightly accent the E note that is found at the 9th fret of the G string. This would be an E4 at 330 Hz (remember guitar is written an octave higher than it sounds. The lowest note is E2 or 82Hz). Now, using the magic equation d=1130fps/frequency, you come up with the distance being about 3.4 feet. Sorry, all you metric people will have to convert your speed of sound to m/s. So, if you put close mics on a guitar amp, and then measure from the close mics 3.4 feet and put up a distance mic, if you combine these at similar levels the first peak from comb filtering will be right around 330Hz. You then can fine tune the distant mic location by ear, basically "tuning" the comb filtering to peak at the note you want. Think of it as a fretless bass or something, if that helps. The difference, if anything, is subtle in the finished product. I like to think that little stuff like this ends up being worth the effort in the end though. (If i ever did this in practice, i would get the guitar player to play an E at 7th fret of the A string, and tune the comb filtering an octave above that. For a truly unique experience, get an assistant to move the mic towards the close mics while you ride the fader to keep the two inputs at about the same level. wooossssSSSSHHHH!!)

These charts are far more useful than they appear. I wasn't going to explain harmonics, but in this case they'd be 330Hz, 660Hz, 990Hz, 1320, 1650, 1980, etc. I would recommend sitting down in front of a piano or synthesiser (with no pitch transposition) and find the charted frequencies on the keyboard. 262 Hz = C4 = Middle C. Also, just for fun play a root note and then play the harmonics. Hold down the damper pedal too. It may take a bit to figure it out, but i feel it is worth the effort to do this at least once.

[M2E]

I thought that there was an easier chart. Im not sure if this is the one I'm thinking of but I thank you for this one. It will come in handy big time.

Thanx Again
M2E

[M2E]

Also there are other freq inbetween those for each key as well.