[flac-dev] Fw: 32 bit data

Erik de Castro Lopo mle+la at mega-nerd.com
Sat Sep 26 15:11:52 PDT 2015

Begin forwarded message:

Date: Sat, 26 Sep 2015 13:46:13 -0700
From: John La Grou <jl at jps.net>
To: Erik de Castro Lopo <erikd at mega-nerd.com>
Subject: 32 bit data

Erik, could you please post this to the FLAC mailing list. I've tried a 
couple times, but nothing happens. Tks.


There are reasons to support 32-bit data. The emerging network standard 
is based on a 32-int pipe (AVB/Dante). Dante now has over 200 licensees.

Higher dynamic range hardware and plug-in products are in the works. It 
won't be long before the 24-bit barrier is commonly exceeded in certain 
devices, though I agree with others here who point out that real-world 
<systemic> dynamic range will likely remain under 20 bits (room => mic 
=> pre => ADC => DAW processing => delivery format => DAC => analog 
stage => amplifier => speakers/HP => room noise)

I believe Reaper and Audition maintain lossless 32-int within a 64-float 
engine, with more DAW makers to come.

And as some have noted, there's movement towards 32-bit audiophile 

FLAC should be the 32-bit delivery format of choice.

> On Sat, Sep 26, 2015 at 10:36 AM, Martijn van Beurden 
> <mvanb1 at gmail.com> wrote:
>     > * This is nuts. 24 bits has a dynamic range of ~140dB which is roughly
>     >    the difference between a quiet whisper in a quiet room, to
>     the sound
>     >    of a jet engine at 10 meters. Surely that is enough?
>     Yes, this is nuts. First, 24-bit is already overkill, as there
>     is no hardware (ADC or DAC) that can handle more than 120dB of
>     dynamic range anyway. There probably never will be hardware that
>     can handle the full 24 bits, because at this point that hardware
>     is already pushing the boundary of thermal noise. Second, most
>     32-bit material is 32-bit float, and that is something the FLAC
>     format can't handle. I really wonder why anyone would have
>     32-bit integer material anyway.


John La Grou

Erik de Castro Lopo

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