Re: What is the type of white noise generated by SoX?

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James Trammell <james.trammell@xxxxxxxxx> writes:

> Hi,
>
> I have found SoX's synth effect useful for generating white noise; does
> anyone know what specific type of white noise it generates?
>
> The different types of white noise I am familiar with are:
>
> White Gaussian
> White triangular
> White uniform
> White binary
>
> Is it one of these, or something else?

It uses this LCG (in util.h):

#define ranqd1(x) ((x) = 1664525L * (x) + 1013904223L) /* int32_t x */
#define dranqd1(x) (ranqd1(x) * (1. / (65536. * 32768.))) /* [-1,1) */

-- 
Måns Rullgård

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