Low-level random noise generator?

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ston
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2015/03/19 06:23:30 (permalink)

Low-level random noise generator?

Does anybody know of some software (a plugin) which can generate random noise signals at specified levels, e.g. around the -80db - -90db range?
 
I suppose I could try e.g. using a synth which has a noise osc and turning down its output until I get the level I want.  Thing is, at that low a level it's hard to see what the level actually is e.g. using a typical DAW level meter.  It'd be nice to be able to define the level of noise being produced.
 
Any other ideas?  I'm going to have a search on t'interwebs...
 
(edit: needs to be something which is 64-bit)
 
Another edit: I've found something that looks ideal in the Melda Productions bundle (the MNoiseGenerator).    Any suggestions on how to accurately measure very low level audio signals?
post edited by ston - 2015/03/19 06:43:36
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    drewfx1
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    Re: Low-level random noise generator? 2015/03/19 12:16:04 (permalink)
    If you output noise at, say, -10dB RMS (make sure you use RMS) and apply -80dB of gain you get -90dB RMS.

     In order, then, to discover the limit of deepest tones, it is necessary not only to produce very violent agitations in the air but to give these the form of simple pendular vibrations. - Hermann von Helmholtz, predicting the role of the electric bassist in 1877.
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    dmbaer
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    Re: Low-level random noise generator? 2015/03/19 16:59:42 (permalink)
    Never tried this, but I suspect that if you export a silent track with dithering enabled that you'd get noise in the vicinity of -90dB.
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    ston
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    Re: Low-level random noise generator? 2015/03/20 06:46:21 (permalink)
    Cheers folks!  I've got a few ideas to try out over the weekend now.
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