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Noise signal from the past

Posted: Fri May 09, 2014 10:41 am
by JMW1937
Audacity 2.0.5 under Windows XP Home

I have a recording with the filename 'Audacity triangular white' made in 1997. It is different from the white noise generated by 2.0.5 in that it has a triangular amplitude-probability distribution (APD) whereas 2.0.5 produces white noise with a uniform (rectangular) APD. Can anyone remember this 'triangular' noise and whether it was intended as a dither noise?

I think there should be a mention that the APD of the 2.0.5 white noise is uniform and not Gaussian. The pink noise IS Gaussian.

Re: Noise signal from the past

Posted: Fri May 09, 2014 12:30 pm
by steve
JMW1937 wrote:I have a recording with the filename 'Audacity triangular white' made in 1997.
There must be some mistake. The first release of Audacity was in 2000.

Re: Noise signal from the past

Posted: Fri May 09, 2014 1:44 pm
by Robert J. H.
Out of curiosity, how did you see that the current white noise has a uniform distribution?
However, it is true and there should be actually a preset for Gaussian noise too.