This tool generates a waveform of four basic types at a custom frequency and displays the corresponding note and octave
Press the play button to start and stop the tone. It will begin playing at the frequency in the white input box with the default being 262Hz (C4). Slide the scrollbar to change the frequency. The scrollbar had a minimum of 1Hz (C-4) and a maximum of 10,000Hz (D#9), however the maximum range can be bypassed by entering the frequency in manually. Change the type of waveform being played by clicking on the corresponding button listed under waveforms.
Sine: The amplitude of the waveform follows a trigonometric sine function with respect to time. Fundamental frequency or "pure tone."
Triangle: Fundamental frequency joined by odd harmonics that decrease at -12dB/octave. Higher, richer and slightly louder than the sine wave.
Square: Commonly used to represent digital information. Contains odd harmonics that decrease at -6dB/octave. Harmonics have a greater impact of timbre of the wave.
Sawtooth: Also called a "ramp." Found often in time bases for display scanning. Can be seen as the "front end" of a triangle wave and the "back end" of a square wave. Generates more overtones, with every harmonic present at gradually decreasing levels.
As a musical tool, tone generation can be used to practice singing or tuning instruments by matching the pitch. There are also a multitude of uses revolving around testing the limits and functionality of audio equipment, as well as in the scientific field with tasks like determining the resonant frequency of objects.
For those with pure tone tinnitus, this tool can assist in determining its frequency.