Musical Notes: music.freq2tone(f) - File Exchange

Code covered by the BSD License

Highlights from
Musical Notes

music.freq2cent(f1,f2) MUSIC.FREQ2CENT Returns the number of cents between two frequencies.
music.freq2interval(f,key) MUSIC.FREQ2INTERVAL Returns the interval and octave of a frequency.
music.freq2note(f) MUSIC.FREQ2NOTE converts a frequency to a note string.
music.freq2tone(f) MUSIC.FREQ2TONE converts a frequency to a musical semitone.
music.interval2freq(I,O,key) MUSIC.INTERVAL2FREQ returns the frequency of a musical interval.
music.interval2note(I,O,key,a... MUSIC.INTERVAL2NOTE returns a note string in scientific pitch notation.
music.interval2tone(I,O,key) MUSIC.INTERVAL2TONE returns the absolute musical semitone of an interval.
music.note2cent(N1,N2) MUSIC.NOTE2CENT Returns the number of cents between notes.
music.note2freq(N) MUSIC.NOTE2FREQ Converts a scientific pitch note to a frequency.
music.note2interval(N,key) MUSIC.NOTE2INTERVAL Converts a note string to a semitone interval and octave.
music.note2tone(N) MUSIC.NOTE2TONE Converts a scientific pitch note to a tone relative to C4.
music.tone2cent(t1,t2) MUSIC.TONE2CENT Returns the number of cents between two semitones.
music.tone2freq(T) MUSIC.TONE2FREQ converts a musical semitone to a frequency.
music.tone2interval(T,key) MUSIC.TONE2INTERVAL Returns the interval and octave of notes in a key.
music.tone2note(T,accsym) MUSIC.TONE2NOTE Converts a musical semitone to a character note.
examples.m
Music function examples
View all files

from Musical Notes by Eric Johnson
Collection of functions for working with musical notes, intervals, frequencies, and cents.

music.freq2tone(f)

function T = freq2tone(f)
% MUSIC.FREQ2TONE converts a frequency to a musical semitone.
%    T = MUSIC.FREQ2TONE(F) converts frequency F to the nearest 
%    semitone.
%
%    Example
%       T = music.freq2tone(220)  % returns -3
%
%    See also music.freq2note, music.freq2interval, music.tone2freq.

%    Author: E. Johnson
%    Copyright 2010 The MathWorks, Inc.


fC4 = 261.625565300599;  % middle C (C4) is 261.63 Hz

T = 12 * log2(f./fC4);
T = round(T);

Highlights from Musical Notes

Highlights from
Musical Notes