Precision Strobe Tuner 1.92

Precision Strobe Tuner 1.91 is a versatile chromatic musical instrument tuner app that offers special temperament and piano tuning functions. It combines a radial spectrum display with a classic strobe tuner and note dial, providing users with visualizations of pitch and tone.

The strobe display is known for its high sensitivity and near instant response speed, making it a preferred tool for piano tuners and instrument technicians. The central spectrum display showcases the input spectrum wrapped around the display, with each octave represented by a different color. The note dial, marked like a clock, displays the twelve notes of the scale. All overtones of the input are shown as peaks in the spectrum display, pointing towards their corresponding notes. The fundamental indicator tic on the spectrum display indicates the note of the fundamental along the note dial.

For coarse adjustment, users can tune the fundamental to the center of the desired note indicator on the spectrum display. As the input approaches the desired note, a two-group pinwheel pattern becomes visible, rotating in the strobe display. Fine tuning is accomplished by adjusting until rotation stops. The strobe display responds instantaneously to pitch changes and is highly sensitive. When rotation ceases, it indicates that the note is in tune.

The app also features various demonstrations, such as a general strobe display demo, calibration function demonstration using a tuning fork, and guitar string tuning example.

The first screenshot showcases the app tuning a guitar low E string. The fundamental is displayed as an orange peak on the spectrum display, with dominant overtones visible due to the string's bright sound.

The second screenshot demonstrates the app's display for an E440 tuning fork, showing the calibration dial enabled and adjusted. In this case, the fork is 2.9 cents flat.

Additionally, Precision Strobe Tuner includes a programmable temperament function with five user-defined banks. The third screenshot demonstrates a temperament bank set up to a typical piano stretch curve. This function can also be used for tuning alternate temperaments, pedal steel guitar setups, or special guitar intonation systems.

Furthermore, the app offers special measurement banks for string inharmonicity characterization and piano stretch curve estimation. Individual strings can be characterized by measuring the fundamental and 2nd harmonic separately. Using a few representative measurement points, a reasonably smooth fit piano stretch curve can be generated. Users can use any number of measurements for this purpose.

Lastly, there is an input signal scope/spectrum display page, which is showcased in the final screenshot.

For more detailed information, the app provides an operation manual that can be viewed at www.precisionstrobe.com.