Type a frequency to see the nearest note and how many cents it is off, or pick a note to get its frequency. Every reading also shows where the pitch falls in the Turkish 53-koma system.
1. To identify a pitch, type its frequency — say a hum at 59.6 Hz or a synth set to 261.6 Hz. The big readout shows the nearest note and how many cents above (+) or below (−) it the frequency sits.
2. To get a frequency, choose a note and an octave. The table below lists all twelve notes of that octave.
3. Change the A4 reference if your orchestra or recording tunes to 442 or 432 Hz; every value recalculates.
In equal temperament every semitone multiplies the frequency by the twelfth root of two (≈ 1.0595), so a note n semitones above A4 has frequency 440 × 2n/12. A cent is a hundredth of a semitone: 1200 × log2(f₁/f₂) gives the distance between two frequencies in cents.
The makam column uses the Arel-Ezgi-Uzdilek system, which divides the octave into 53 equal komas (≈ 22.64 cents each) counted from perde Rast. Rast is written as G and sounds at G3 = 196 Hz in Bolâhenk; the tool names the nearest of the system's 24 perdes and how many komas away the frequency is.
Wavelength is the speed of sound (343 m/s at 20 °C) divided by the frequency — handy for placing bass traps and understanding room modes. For hearing makam steps rather than reading them, open the Turkish Makam pages or the Makam Tuner.
What frequency is middle C?
Middle C (C4) is 261.63 Hz when A4 is tuned to 440 Hz. At A4 = 442 Hz it rises to about
262.81 Hz.
How many cents out of tune is noticeable?
Most listeners notice about 5–10 cents between two notes played together; a single note on
its own can drift further before anyone hears it. Tuners usually call ±5 cents in tune.
Why is a koma about 22.6 cents?
The Arel-Ezgi-Uzdilek system splits the octave (1200 cents) into 53 equal parts, and 1200 ÷
53 ≈ 22.64. A whole tone (tanini) is 9 komas and a small half step (bakiye) is 4.