online tone generator
play a test tone at any frequency and waveform. use it to tune an instrument or check speakers and headphones.
runs on your device · free · no sign-up
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frequently asked questions
what frequencies can i hear?
most adults hear about 20 hz to 15-18 khz. your speakers may not reproduce the lowest and highest ends.
which waveform should i use?
sine is the purest. square, sawtooth and triangle add harmonics and sound brighter.
is it safe for speakers?
keep the volume low, especially at very low or high frequencies.