Operation Manual

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2.6.3 Set the Sync Source
Whenever multiple Hilos and Auroras are used in a Thunderbolt daisy-chain, it is critical that clock synchronicity is
achieved. In the vast majority of cases we would recommend one of the following clock schemes:
- Use a master clock with multiple clock outputs, ideally as many outputs as there are Hilos in the chain, and
connect each Hilo to a unique word clock connection. In this case, ALL of the Hilos should be set to “EXT”
as the SYNC SOURCE. In this state, it is important to set the Sample Rate on your clock master, to match the
sample rate of your audio file or audio project.
- Use Hilo #1 in the chain, and have the other units slave in a clock daisy chain. Connect a word clock cable
from the WORD CLOCK OUT of unit #1, to Clock IN of unit #2, Clock OUT from Unit #2 to Clock IN of
Unit #3, etc. Set unit number one to “INT” as the SYNC SOURCE and all of the other units to “EXT”. In this
state, the system should respond to sample rate changes within the computer automatically.
NOTE: When 3 or more Hilos and/or Auroras are used in a single system, some form of clock distribution is
recommended to insure phase coherence of the clock signal.
2.6.4 Configure for use
In Windows, one can use the Sound section of Control Panel to select whichever unit is desired as the default playback
device. Unfortunately, Windows is known to jumble the device order here. To determine which unit in the list is the
one that you wish to use, follow this process:
* From Control Panel > Sound > Playback, you will see all of the Hilo Devices. Play 1+2 in this list will be labeled as
“Speakers”. Click one of them to select.
* Click Properties > Advanced
* Click the “Test” Button
* Look at the Hilo Meters. Whichever shows Meter activity for the first pair of channels when “Test” is clicked
corresponds to that instance.
* When you determine the desired unit, from the Playback tab of SOUND, right-click that device and select “Set as
Default Device”.
When using ASIO applications, all of the Lynx Interfaces will be presented as a single ASIO device, labeled “Lynx
ASIO”. When “Lynx ASIO” is selected as the current audio device, all of the I/O from all of the interfaces will be
presented in order. The device order and channel mode of each interface determines its position in the list of I/O. ASIO
devices will be labeled with the Device ID, then the Play or Record channels. For instance:
“1: Hilo Play 1+2” is for Unit 1, Channel 1+2
“2: Hilo Play 3+4” is for Unit 2 Channels 3+4 etc.
In OS X, all the units must be configured into a single
“Aggregate Device” in order for their combined I/O to be
accessible to an audio application.
An Aggregate Device is created from Applications >
Utilities > Audio MIDI Setup in OS X. Make sure that
the Audio Window is open. Click the “+” button at the
bottom of the window to create a new aggregate device.
You can name it whatever you wish, or accept the default
name. Click to check each of the Lynx Interfaces that you
wish to be combined into this aggregate device. Up to six
interfaces can be added. Make sure that the Drift or
Resample box is un-Checked for each selected interface.