Pitch Analyzer

A pitch is detected by analyzing input sound and displayed in real time.

This app can help you to tune a musical instruments or practice a singing.

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A pitch detection was an octave off until ver 2.0.0 ( A4 was displayed at A3 )

I corrected the bug in ver 2.0.1

I am terribly sorry to have troubled you so much.

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On the graph area:

* Move a scale display area by dragging

* Zoom in and out by pinching (or push the buttons on the bottom of the graph)

Display area of a volume graph and pitch detection sensitivity is adjustable using the bars

on the bottom of the screen.

Purchase this app:

* Release function restrictions on a setting screen

* Remove ads

Setting items:

* Graph [Log, Liner]

* Scale [Equal temperament, Frequency [Hz]]

*Window function [None, Hanning window]

(Window function can improve accuracy of a pitch detection, but you would hardly feel the difference)

Technical info:

* A pitch is calculated by a autocorrelation function (using FFT, IFFT, for fast computation)

* Sampling frequency is 8000 Hz

* The frequency at A4 is 440 Hz