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Old 4th July 2008, 12:37 AM   #1
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Default 1/3 octave warble or pink

I have been searching the net for test tones for speaker testing. I can find individual tones or full spectrum pink noise but I have yet to find 1/3 octave warble tones or 1/3 octave pink noise (pink limited to individual 1/3 octave bands). Are these things so hard/expensive to generate that there are none available outside of purchased CDs? I don't have appropriate software to generate my own. Audacity will make a white noise file that you can the filter but the filtering is pretty limited in effectiveness.
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Old 4th July 2008, 04:24 AM   #2
drewmc is offline drewmc  United States
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Audacity allows the use of plug in filters. Look for the glam bandpass filters. These are FIR filters that can be set to any frequency. I created a set of 1/3 octave noise tracks using pink noise. When all the track are played simultaneously you cannot tell it from unfiltered pink noise.
I would send you the files except they are 307MB
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Old 4th July 2008, 09:21 PM   #3
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http://cgi.ebay.com/1-3-Octave-Pink-...QQcmdZViewItem
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Old 5th July 2008, 02:59 AM   #4
Irakli is offline Irakli  United States
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Here is how to make warble tones yourself using Cool Edit.

http://mysite.verizon.net/tammie_eri.../coolwarb.html
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