Sound Design Stack Exchange is a question and answer site for sound engineers, producers, editors, and enthusiasts. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I need to generate a tone with a gradually increasing pitch with a very slow ratio. That is, I need a sine/square/sawtooth tone (amplitude doesn't matter) starting from 20Hz and gradually, linearly (or exponentially) increasing to 16kHz over 10 minute period. I need it to test a very specific audio device.

This seems like a simple task, yet I cannot find any free tool which would generate such a tone and save it to WAV or something like that. I tried fiddling with Audacity, but either I cannot find it or such tone not possible to achieve in it.

Does anybody know any free tool which would help me in generating such tone?

share|improve this question

migrated from Jan 27 '14 at 15:22

This question came from our site for engineers, producers, editors, and enthusiasts spanning the fields of video, and media creation.

I'm just intrigued as to the device :-) – Rory Alsop May 27 '11 at 21:12
up vote 4 down vote accepted

This does almost everything you need (save for the length):

Another one, also with a length limitation:

If you use a linear sweep, you can simply divide your 10 minutes into whatever is possible with the above tools and then splice the sound together in Audacity afterwards.

share|improve this answer
Thanks, the Multisine tool is exactly what I've been looking for. – Neo May 26 '11 at 15:39

Audacity can do this, although I've not personally made one longer than 30 seconds. Select Generate | Chirp:

Audacity Generate Chirp

(be careful not to hurt your ears when playing it back!)

share|improve this answer
+1 - Nice to know! – boehj May 27 '11 at 0:13

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.