Re: [Audacity-devel] Noise generators

[Rob S. <aq...@ya...>]

----- Original Message -----

> From: Steve the Fiddle <ste...@gm...>
> To: Audacity-Devel list <aud...@li...>
> Cc: 
> Sent: Wednesday, 23 January 2013, 4:17
> Subject: Re: [Audacity-devel] Noise generators
> 
> Attached is a patch based on Paul Kellet's "instrumentation grade" 
> algorithm.

That looks good; the one in sox is a bit faster (than both old and new here) but not as accurate.

Re-looking at sox's brown noise, it seems good, speed & quality-wise.  The behaviour < 20Hz is such that the amplitude > 20Hz is not forced down much. White noise through a single-pole LPF at say 1Hz is of course, more accurate < 20 Hz, but it pushes down the amplitude in the audible part of the band for no apparent (to me) benefit.

Cheers,
Rob