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Asked: 2026-05-24T11:06:30+00:00

For a small web app I’m making, I need to output sinusoidal test tones

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For a small web app I’m making, I need to output sinusoidal test tones for client-side audio playback.

The thing is, I can’t seem to find a way to do it in javascript without downloading and looping pre-rendered WAV files.

Is there a standards compliant method out there of outputting test tones? Or must I build the test tones on my own and use something like this to play back the files?

(I would much prefer to generate the test tones real-time so that I can generate a number of frequencies beyond the limited gamut of frequencies available to me with a sample set of WAV files.)

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1 Answer

  1. Editorial Team

    There is a way of doing this by using the data URI scheme, but it is a bit of a hack, and probably isn’t very efficient. You should also keep in mind of length limits for the data URI.

    See http://ajaxian.com/archives/generating-and-playing-sound-in-javascript and http://softwareas.com/offline-sound-no-flash-no-file.

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