[PD] audio bit resolution in Pd

[Jörn Nettingsmeier]

On 04/23/2015 05:52 PM, Alexandre Torres Porres wrote:
> What? 32Bit 384KHz dac? And for 50 bucks? what the $*#%@?
>
> 2015-04-23 12:43 GMT-03:00 Charles Z Henry <czhenry at gmail.com
> <mailto:czhenry at gmail.com>>:
>
>     It's already started.... 32bit DACs are available from AKM and XMOS,
>     for example.  Although I don't know what software/hardware platform
>     you'd use to actually make use of this precision, you can build your
>     own 32-bit sound playback interface with a few boards from HK:
>     http://www.yuan-jing.com/dacs-decoder/32bit-192khz-usb-dac-decoder-ak4399-wm8805-pcm2706-opa627au-optical-coaxial
>     http://www.yuan-jing.com/dacs-decoder/xmos-usb-audio-32bit-384khz-dac-decoder-board-pcm5102-tda1308-headphone-amp
>

Yeah, but 11 bits of noise sound so much more clear and precise than 3 
bits of noise. Also, noise from DC to 192k sounds much more brilliant 
than noise from DC to only 24k.

(To clarify, these noise bits are integer, not floating point. Floating 
point noise bits sound even more wonderful, but they require double 
precision.)

Also, air has a theoretical dynamic upper bound of 194 dB(SPL floating 
point) above hearing threshold before we hit hard vacuum in the 
low-pressure zone (leaving little pesky non-linearities aside), so we 
totally need those 32 bits (vacuum transients without headroom tend to 
sound mushy and lack punch).

Thanks to Yuan-Jing.com for finally enabling us to hear those in-engine 
recordings of the Saturn V launches like they were meant to be heard (at 
least for a split second, before dying of blunt trauma to the head).

(And yeah, I totally believe those specs and all their babble is 
absolutely plausible. Pd needs to be more future proof.)




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Jörn Nettingsmeier
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