Universal Tuner V1.1 NEW
For all instruments


Operating System

MacOS 10.15 or later



Supported Instruments

There is at least one tuning available for the following instruments:

  • Guitar
  • Guitar, Bartone
  • Baglama, long neck
  • Banjo
  • Bass
  • Cello
  • Dulcimer
  • Fiddle / Violin
  • Kora
  • Koto
  • Mandobass
  • Mandolin
  • Oud
  • Pedal Steel Guitar
  • Ukulele
  • Vihela
  • Viola
  • Zheng


Universal Tuner is made to tune all instruments.

IMPORTANT: For the program to work properly, it is important to set the Input Threshold correctly according to your input device. When there is silence, the signal should stay under the red line of the input peak meter (See Fig. 1). If you play a note the signal should surpass the red threshold line.

By default the auto detection is activated. If you want to set the input threshold manually, go Preferences and deactive auto detection (See Fig. 3).

Figure 1: New Audio Input


spacebar Start/stop the tone generator
? Open the Help window
Cmd-1 Open the Tuner window
Cmd-2 Open the Spectrum window
Cmd-3 Open the Timeline window
Cmd-4 Open the Tuning window
Cmd-5 Open the Temperament window
Cmd-6 Open the Chord Detection window
Cmd-7 Open the Tone Generator window
Cmd-5 Open the Tuning window
Cmd-, Open the Preferences window for general settings


aug augmented The augmented note is played one semi note higher than usual. In most cases it means the 5th is augmented.
In some chases it is also used for the 4th and the 6th.
dim diminished The diminished note is played one semi tone deeper than usual. In most chases it means the 5th is diminshed.
In some chases it is also used for the 4th and the 6th.
maj major Major usually refers to the 3rd. The major third is 4 semi tones higher than the root note. A major chord contains a major 3rd. In the chord name the major 3rd usually is not written out. (E. g.: A major = A)
min, m minor Minor usually refers to the 3rd. The minor third is 3 semi tones higher than the root note. A minor chord contains a minor 3rd!
root root note Starting note of a scale. First note of a scale.
sus suspended A suspended chord has a note within it, that is “suspended” either a 4th or a 2nd above the root note.


The tuner window (Fig. 2) shows the pitch of the played note in cent.

One octave is divided into 12 semi tones. Each semi tone is divided into 100 cent.

Zero cent indicates that the played note is in tune. If the cent meter shows a negative value the note is flat (too low). If the note is sharp (too high) the cent meter shows a positive value.

Figure 2: Tuner window

Figure 2-1: Tuner mini window


Set the parameters as you need them.

If you want to change the input or output to another device, please use Apple′s System Preferences. If the device is not detected properly by Universal Tuner, please press the Update I/O-button.

Hint: Use the trackpad or the scroll wheel of your mouse to adjust the sliders or the concert pitch.

Figure 3: Preferences window


Figure 4: Spectrum window


Figure 5: Timeline window


Select your instrument and tuning.

You will see a representation of the tuning as seen from above, facing the instrument. Starting with one for the lowest string.

Note: If you pick guitar, you will get an alternative tuning option, that can be activated by clicking the “Magic wand”-button (see Fig. 6).

Figure 6: Tuning window


The standard tuning in western music is called “12 Tone Equal Temperament” (12-TET). In 12-TET all notes are equally spaced thruout an octave. This leads to equal intervals in any key. On the downside the intervals are not “pure” as they occure in nature.

“Just Intonation” will give you “pure” intervals in relation to the selected root note. But the further you move away from the root note the stranger the intervals will sound.

The other temperaments try to find a compromise between “Equal Temperament” and “Just Intonation”.

Tip: If you are using an open tuning, set the root of the temperament to the root of your open tuning and pick “Just Intonation”. Give it a try!

Create and Save a Custom Temperament

Select Custom-Temperament and enter your deviations by clicking on one of the 12 note buttons to enter a new value for the deviation (only value between -50 and +50 cent are accepted).

You can change the value of the root note (orange button), but why would you want to do it?

Save Custom Temperament
If you customize a temperament this button will appear. You can save your customized temperament by pressing the button.
Rename Custom Temperament
Select one of your saved custom temperaments and then you can rename it.
Delete Custom Temperament
If you select a saved custom temperament this button will appear. You can delete the scale by pressing the button.

Hint: Hover over root note and use the trackpad or the scroll wheel of your mouse to adjust it.

Figure 7: Temperament window

Chord Detection

Play all notes of your chord at once to get the best result.

Play the root note of the chord and press the “Freeze”-button. The root note is locked in now and any other note you play will be shown as a component in a chord in relation to the root note.

Hint: Hover over the “Freeze”-button and use the trackpad or the scroll wheel of your mouse to adjust the root of the chord.

Figure 8: Chord detection window

Tone Generator

Hint: Use the trackpad or the scroll wheel of your mouse to adjust the volume, frequency, cent value, note or octave. Just hover over the slider or value.

Figure 9: Tone generator window

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