AFAIK everything Jack (including Ardour) uses single precision 32 bit
On Mon, Jul 18, 2011 at 9:38 AM, Erik de Castro Lopo wrote:
32 bit floating point gives a dynamic range of ~192dB, well above the
dynamic range of our hearing or any analog audio hardware, leaving
ample headroom for rounding errors to disappear.
I would not speak of inferiority or superiority when comparing this
and 48 bit integer calculations of pro tools. Single precision floats
as jack uses them will not be the bottleneck of SN ratio or any other
performance measure, the same is most likely true for anything pro
tools does. (I'm sure it is, just writing "most likely" 'cause I don't
Giving this paper a quick look, they use the term "double
precision" for 48 bit integer, probably relating it to the 24bits of
the DA/AD converters. All that
bit-shifting/truncation/extra-headroom-bits-stuff mentioned there is
related to the integer format and does not apply to floats.
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