Finding a chord frequency

[PlasticSoul]

Hi guys!

Wish you could help me with something...

A (third octave) is 220 hz
C (second octave) is 65.4 hz

This is used for single notes, but...

How do I calculate a chord frequency? Like A minor?

I dont think I will do the right thing if I just sum the 3 notes frequencies, hehe...

[Meffy]

Each note in the chord has a frequency. If a chord could be said to "have" a frequency, it would be the frequency of the chord's root note. But really a chord has three or more frequencies, one per note.

[dark_virus]

Boa pergunta, compatriota!

Sempre quis saber isso também.

[IleMacedonia]

I think that Meffy said it pretty right.

[geroyannis]

Don't forget each note's harmonics.

[PlasticSoul]

So...

A, Am, Amajor, A7, etc... All these chords have the same frequency?

So, why they dont have the same sound?

I'm confused...

[C00kie]

A, Am, Amajor, A7, etc... All these chords have the same frequency?

No, they just have the same root note. A chord does not have a frequency. Only single notes can have a frequency.

So, why they dont have the same sound?

Because they are constructed from different notes. You hear a mixture of the played notes, not one single frequency.

To make matters more complicated: even a single note is made of a whole bunch of different frequencies. With just one exception: the sine wave. All other basic waveforms can be constructed from stacking sine waves of different frequencies. If you start with a sine wave of 110Hz and add to that sine waves of 220Hz, 330Hz, 440Hz, etc etc, then you get a sawtooth wave with a base frequency of 110Hz. But spectral analysis will reveal what it's really made of.

[PlasticSoul]

Hummm...

Now I got it, cookie.

Thanks everybody.