Re: 64bit processing - Why?
Re: 64bit processing - Why?
- Subject: Re: 64bit processing - Why?
- From: tahome izwah <email@hidden>
- Date: Sun, 2 Aug 2009 22:48:51 +0200
2009/7/31 Brian Willoughby <email@hidden>:
>
> First of all, analog dynamic range is not precisely equivalent to digital
> dynamic range. Analog noise is generally gaussian in nature, is typically
> completely uncorrelated to the signal, and the human hearing system (which
> includes the brain as well as the ear organs) has amazing abilities to
> ignore such noise. Not only can 'analog' noise be ignored, but we can
> clearly hear signals that are well below the noise floor. An analog tape
> deck with little more than 60 dB still preserves audible signals well below
> -60 dB.. IN contrast, digital quantization noise is correlated to the
> signal, is not present in natural sounds, and the human hearing system does
> not have the same ability to disregard such noise. On top of that,
> undithered A/D or bit reduction will completely lose signals that are below
> the quantization noise floor. They're simply missing - not bathed in noise:
> but gone.
Yes I agree from a purely technical standpoint, however, for all
intents and purposes the question is always "does the average user
care". If you take into account thermic noise from any given amplifier
(even hi end ones) these effects happen totally off the scale. They
simply get lost during reproduction in 99.999% of the cases. Not all
the people who own a Mac have a $100.000+ studio at their disposal. If
you don't have a high end, all digital, fully soundproof studio then
it really doesn't make a difference, or in other words, the difference
that you would get would not even begin to justify to the additional
processing power and bus bandwidth that you would need in order to get
there.
People claim to hear all kinds of things, if someone would finally do
a double blind field study to find out what is really going on I'm
sure he would find that this is all marketing hype to make people buy
high end gear and the next generation of computers. In reality, I'm
pretty sure using float or double doesn't make a difference. None that
I can hear anyway.
Just my 2 cents,
--th
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