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Test Audio Generator — Tones, Noise & Silence

Generate WAV test audio: sine, square, sweep, noise or silence at any rate, depth and duration.

A test audio generator produces WAV files containing a sine, square, sawtooth or triangle tone, a frequency sweep, white noise or pure silence. Set the duration, frequency, sample rate, bit depth, channel count and amplitude, and the file is encoded sample by sample in your browser.

Runs in your browser
Sample rates
8 kHz to 192 kHz, covering telephone through studio
Bit depths
8, 16, 24 and 32-bit PCM, mono or stereo
Duration
From 10 milliseconds to one hour
Privacy
Runs entirely in your browser — nothing is uploaded
Cost
Free, unlimited, no sign-up

Frequently asked questions

Why does my tone click at the start?

Because the waveform begins mid-cycle at full amplitude. Set a fade of 10–20 ms and the click disappears — that is what the fade control is for.

What sample rate should I pick?

A rate must be at least twice the highest frequency you want to represent, which is the Nyquist limit. 44.1 kHz covers human hearing; 48 kHz is the standard for video; anything higher only matters for studio processing.

Why generate silence?

A silent file of a known length is the cleanest way to test duration handling, padding, concatenation and playback timing without any audio content confusing the result.

How to use the sample audio file generator

  1. 1Choose the waveform.
  2. 2Set the duration.
  3. 3Set the frequency.
  4. 4Set the sweep end frequency.
  5. 5Choose the sample rate.
  6. 6Choose the bit depth.
  7. 7Choose the channels.
  8. 8Set the amplitude.
  9. 9Set the fade in / out.
  10. 10Set the how many files.
  11. 11Enter or paste your seed.
  12. 12Press Run, then download the result when it is ready.

Embed this tool

Put the working sample audio file generator on your own site. It runs in your visitors' browsers exactly as it does here — free, no account, nothing uploaded.

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