Music Note Frequencies for Passive Piezo Buzzer

Use these with the Arduino tone(pin, frequency, duration) function.

Variable Names for Arduino Code

// Octave 3
float C_3  = 130.81;
float Csharp3 = 138.59;
float D_3  = 146.83;
float Dsharp3 = 155.56;
float E_3  = 164.81;
float F_3  = 174.61;
float Fsharp3 = 185.00;
float G_3  = 196.00;
float Gsharp3 = 207.65;
float A_3  = 220.00;
float Asharp3 = 233.08;
float B_3  = 246.94;

// Octave 4 (Middle C)
float C_4  = 261.63;
float Csharp4 = 277.18;
float D_4  = 293.66;
float Dsharp4 = 311.13;
float E_4  = 329.63;
float F_4  = 349.23;
float Fsharp4 = 369.99;
float G_4  = 392.00;
float Gsharp4 = 415.30;
float A_4  = 440.00;
float Asharp4 = 466.16;
float B_4  = 493.88;

// Octave 5
float C_5  = 523.25;
float Csharp5 = 554.37;
float D_5  = 587.33;
float Dsharp5 = 622.25;
float E_5  = 659.26;
float F_5  = 698.46;
float Fsharp5 = 739.99;
float G_5  = 783.99;
float Gsharp5 = 830.61;
float A_5  = 880.00;
float Asharp5 = 932.33;
float B_5  = 987.77;

Frequency Table

Note	Also Known As	Octave 3	Octave 4 (Middle)	Octave 5
C		130.81	261.63	523.25
C#	Db	138.59	277.18	554.37
D		146.83	293.66	587.33
D#	Eb	155.56	311.13	622.25
E		164.81	329.63	659.26
F		174.61	349.23	698.46
F#	Gb	185.00	369.99	739.99
G		196.00	392.00	783.99
G#	Ab	207.65	415.30	830.61
A		220.00	440.00	880.00
A#	Bb	233.08	466.16	932.33
B		246.94	493.88	987.77

Note: A4 = 440 Hz is the standard tuning reference pitch.

Note Durations (example at ~90 BPM)

int eighthNote  = 167;   // ms
int quarterNote = 334;   // ms
int halfNote    = 668;   // ms
int wholeNote   = 1336;  // ms

Adjust these values to speed up or slow down your song. Shorter = faster tempo.