This plug-in calculates the frequency of a note entered as “Note + Octave”.
For example, entering “A 4” as the note will give a result of 440Hz, assuming “A 440” tuning (A440 (pitch standard) - Wikipedia)
The plug-in also calculates the “Note + Octave” notation for a given frequency.
For example, entering “440 Hz” as the frequency will give a result of “A 4”, assuming “A 440” tuning.
Note values are represented as “Note + Octave + Cents”.
A “Cent” is 1 hundredth of a tone.
The plug-in also supports non-standard tuning in the range A4 = 430 Hz to A4 = 450 Hz (default A4 = 440 Hz).
The verbosity of the output can be changed, which may be useful if you need to quickly copy and paste multiple conversions.
Note that on Windows (and perhaps Mac OS X ?) it is not possible to select and copy from the returned message window, but if you click on the “Debug” button rather than the “OK” button, a second “debug” window will open after closing the message. The result from this plug-in is duplicated in the debug window and this may be selected and copied. This is not usually necessary on Linux as the normal message can be selected and copied using a mouse, but may still be useful for keyboard only operation.
- Note: [C, C# / Db, … B] (defaut C) The note letter to be converted to a frequency.
- Octave: [0 to 8] (default 4) The note octave.
- Frequency (Hz): [1 to 8000] (default 440) The frequency to be converted to a Note.
- Show output as: [Select the verbosity of the output] (default “Full details”)
- A4 Tuning (Hz): [430 to 450] (default 440 Hz) The tuning standard to be used.
Example of “Full detail” output:
For equal-tempered scale, A4 = 432.00 Hz:
The frequency of C 4 is 256.87 Hz.
The closest note to 440.00 Hz is A 4.
440.00 Hz is A 4 +31.77 Cents.
Note/ Frequency conversion tables are available on-line here: Frequencies of Musical Notes, A4 = 440 Hz
Note that this is a “Generate” type plug-in (even though it does not actually “generate” anything) and will appear in the “Generate” menu. Hopefully Audacity will eventually have a “Tools” menu.
note-frequency.ny (2.66 KB)
Please let me know if you find this plug-in useful by posting a reply.
Questions and/or bug reports relating to this plug-in should also be posted here.