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Welcome to Which note is it? page.

Here you can read information about the main features of this part of the Escalador application.
The main function of it is to ask, by means of the interface, the correspondent musical note name of a frequency with its respective cents.
For example: If we ask about the frequency 55 (Hz):

The answer is: Note A1, A octave 1 with 0 cents

Some explanations:
• Index represent the number of cents from the origin frequency of calculation – related with de assigned diapason – to the asked frequency, in our example 55 Hz.

The results of calculations are given here
with the standard convention

• About Semitones conversion index:

900 means: 900 cents from an octave point of view. In our example, 9 semitones from C1 is A1
One important thing to know: Calculations to name a note are made from C.

The frequencies and notes below correspond to the A (440 Hz) temperament.

• About: Cents adjuster
You can adjust the frequency in function to get precised data.


For example you can put 0.1 on the adjuster field

Then you click the correspondent button (+ 0.1) as in this example, then you will see:
A1 with 3 cents. And the frequency is now 55.1 or more precised 55.100.
Each time the button is clicked the program will add (in this case, 0.1) to the overall frequency.

Then the same operation (for subtraction) can be done with the minus ( – ) button.

• Fancy frequencies…
You can also put on the frequency field any positive number : 82342749283492836773211380549083615260521152304256122880
Here we obtained a G sharp octave 181 with 60 cents…

• Checking harmonics of a fundamental frequency:
We can check the harmonic series of a fundamental frequency. To do so, lets take C0 (16.352Hz) as a fundamental frequency.

Then insert this number (16.352) into the cents adjuster

Then by clicking the ‘+ 16.352’ button we can obtain the frequencies of the harmonic series.

And so on…