User Manual

Page 14
3.4 Home Menu
3.4.1 Sample Rate
Hilo will display the sample rate that it is currently operating at. If clocked externally, this may be the
sample rate being generated by the clock source. If clocked Internally, the sample rate may reflect the rate
of audio being played or the rate requested from an audio software application.
If Hilo has the Sync Source set to Internal, then one can manually choose a sample rate by
pressing the Sample Rate button and tapping on the desired rate, unless Hilo has a valid USB
connection to a computer. In this case, the sample rate needs to be set from the active audio
application or as a global setting in the OS.
Note: 176.4 kHz and 192 kHz are available only via USB when the LT-USB is set to 8
channel mode (on the Tools menu page).
3.4.2 Sync Source
This button will show the currently selected Sync Source.
When you push the Sync Source button, you may select any of six possible clock sync
options. If a clock source is valid, a sample rate will appear next to that selection. For
instance, if a clock source is connected to the Hilo word clock input, next to “Word Clock”
there would appear the sample rate that the clock source is generating.
When the LT-USB is NOT connected to the computer, the Sync Source
may be changed to one of the following four choices:
• Internal: Clock driven by the Hilo’s crystal oscillator.
• Word Clock: Clock derived from the WORD CLOCK input.
• Wordclock/2 and Wordclock/4: These are currently not implemented
in the Hilo firmware.
• Digital: Clock derived from the active digital input.
• ADAT In: Clock derived from the ADAT input. Once an ADAT
signal is detected on the Optical Input, Hilo automatically switches
the Optical input from S/PDIF to ADAT. In this mode, the additional
ADAT inputs appear as available channels on the output mix routing
page; meter source selection and the test tone page.
The box next to each clock source will display the clock rate when that port has a valid clock source attached. If that clock source is
selected, that rate will become the current clock rate for Hilo. If Hilo detects that a specific Sync Source is not valid, that Sync Source
button will be disabled and “Not Present” will be displayed next to it.
Please note: when Hilo is connected to a computer via USB, Sync Source can only be changed by disconnecting the USB cable. In this
state the SYNC SOURCE button is crossed out, indicating a disabled parameter.