Operation Manual

Page 42
4.5.4 Sample Rate Converter
Hilo features a powerful Sample Rate Converter for the AES and SPDIF
Inputs. When active, the onboard SRC processor supports for conversion
ratios up to 16:1 with 144 dB dynamic range and -140dB THD+N. The
SRC will convert signals on the active Digital Input up or down to the
current Sample Rate.
When the Sample Rate Converter button is tapped,
SRC can be switched on or off, and information about
the current sample rate, digital in rate, and the ratio of
conversion, will be displayed if applicable.
Note: Even if the Current Rate and Digital In Rate are the same, sometimes it is useful to have SRC engaged so that the
signal streaming to the digital input can be re-clocked. This is a useful state for digital devices that do not have the
option to be a clock slave.
The SRC Mode is ON by default. When devices are connected to the Hilo digital inputs and valid clock
synchronization is established between them, then it is recommended to turn SRC OFF to insure the best audio
performance.
4.5.5 DSD Mode
DSD support was added with Hilo Firmware revision 5.
This allows Hilo to play DSD audio files received via Thunderbolt, AES-3 or S/PDIF. Hilo supports the recently
adopted DoP V1.1 standard which is a method for transferring DSD audio over PCM frames. Playback of DSD using
this method is provided by a growing number of software vendors including Channel D and Audirvana for Macintosh,
and JRiver Media Player for Windows.
Using the DSD application of your choice, connect your computer using the TBT or Digital Input (AES IN; S/PDIF
COAX IN or S/PDIF OPT IN). Before playing, make sure the DSD Mode button is set to Auto. In this mode DSD