Re: 64bit audio read and write

[Matt Flax <flatmax@flatmax.org>]

On 06/07/16 21:41, Måns Rullgård wrote:
> Matt Flax <flatmax@flatmax.org> writes:
>
>> On 06/07/16 17:29, Eric Wong wrote:
>>> I'm not up-to-date with the latest technology, but even 32-bit
>>> is far beyond the range of human hearing; and last I checked;
>>> available ADC/DACs can't even make full use of 24-bit (nor
>>> our ears).
>> 120 dB SPL (threshold of discomfort) is around 20 billion times louder
>> then 20 dB SPL (a whisper). That is approximately 24 bits.
>> However, we can hear down to 10 dB SPL, or lower for young people ...
>> that is approximately 40 bits of dynamic range.
> 120 dB is outright painful and damages the ears.  100 dB is already
> unpleasant.
>
> You should also check your calculations.  With your limits, the required
> dynamic range would be 110 dB, which comes out to 20 bits with a bit of
> margin.
>
http://www.nal.gov.au/images/diagram-of-noise.jpg
Anything above 75 dB SPL  has potential to damage your hearing, 
depending on exposure time. The fact that we can hear with clarity over 
such large dynamic range is extraordinary isn't it !

I think the point I am making is that you can't capture 64 bit words of 
data in audio files with only 32 bit word reads/writes from file. I 
wasn't aware that sox didn't have any methods for 64 bit audio data file 
read and writes. From a pure data perspective, no qualms right ?

Matt

------------------------------------------------------------------------------
Attend Shape: An AT&T Tech Expo July 15-16. Meet us at AT&T Park in San
Francisco, CA to explore cutting-edge tech and listen to tech luminaries
present their vision of the future. This family event has something for
everyone, including kids. Get more information and register today.
http://sdm.link/attshape