Features; Product Features - Cary Audio Design SI-300.2d Owner's Manual

FEATURES

The following section describes the SI-300.2d basic features. Please read the Operation Section of this
manual to learn more on utilizing these features. The features are subject to change without notice or
obligation.
TruBit™ DSD & PCM CONVERSION AND UPSAMPLING
Upsampling can be messy, leaving behind lots of digital artifacts resulting in noise and inaccurate
signal generation. On the surface, upsampling may seem like a good idea. But if not implemented
properly it can be disastrous. Many DACs use modest DSP chips at best, or worse, the DAC chip
itself to upsample all incoming digital signals. Typically, this is done as a predefined one-size-fits-
all sample rate, such as 96 kHz, 384 kHz, etc. On the contrary, Cary Audio's TruBit™ Upsampling
is a sophisticated and powerful process utilizing a dedicated 128 bit DSP engine which allows for
up to 10 different selectable TruBit™ sample rates and an increased bit depth of 32 bits for PCM
and 1 bit for DSD. This allows PCM to be converted to DSD or lower DSD rates Upsampled to
higher DSD rates. Working in tandem with our OSO™ Reclocking feature, the newly generated
signal is cross-checked multiple ways ensuring that the selected upsample rate is as if it were an
original native signal. The result is a signal free from digital artifacts that sounds accurate, pure,
and a joy to listen to
fi™ BLUETOOTH IMPLEMENTATION
Bluetooth modules are a fantastic and convenient way in which to share and listen to music from
online and mobile sources. It's not unusual for companies to use such modules as a complete
end-to-end or add on solution whereby using the cheap low-grade onboard DAC chips included in
the modules and simply passing the analog signal of the module to the analog output section.
Our solution is to fully integrate (fi™) the digital information of the CSR aptX® lossless Bluetooth
receiver into the entire digital circuit of the SI-300.2d. This approach ensures that Bluetooth
sources have the potential to sound like any other expensive input source whereby utilizing our
sophisticated digital topology and our other integrated digital features such as; TruBit™
Upsampling, and OSO™ Reclocking,. Now your Bluetooth sources can truly be high fi .
OSO™ RECLOCKING
Once a digital signal is transferred into Cary Audio's digital ecosystem via the digital inputs or CD,
it is processed with extreme care to ensure the best possible sound achievable. As a digital source
transfers from one point A to point B it creates an insidious digital problem called jitter. To deal
with this, Cary Audio uses something we call OSO™ Reclocking. While USB Asynchronous inputs
use the XMOS processor to control the clocking of the USB host, other non-USB sources don't have
this luxury. Our solution is to re-clock all signals again once onboard, even XMOS USB, as to
ensure all jitter is virtually eliminated to a minute degree. We call this OSO™, short for "Onboard
Signal Origination" because this re-clocking and buffering creates a signal so stable and jitter free
it's as if the origin of the signal was generated onboard and not from an external source.
XMOS xCore USB ASYNCHRONOUS
XMOS is the de-facto standard in USB Audio 2.0. This design delivers bit perfect PCM audio up to
384kHz, DSD and DoP format support, round trip latencies as low as 3ms and use asynchronous
clocking for computer USB sources. This means the SI-300.2d has complete control over the audio
clock quality; essential for no-compromise digital audio systems.
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