Lynx Studio LT-TB Thunderbolt - Manual (Page 12)

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10. Plug in and power up the Aurora using the front panel standby switch. You can see the
LT-TB from the slits in the Aurora top cover. If the green LED on the LT-TB corner (by
the transformer) is flashing, the installation was successful. When a Thunderbolt cable is
connected between the Aurora and a computer, and the driver is loaded, then the LED
will go solid. If the LED does not light, unplug the Aurora and re-mount the LT-TB,
making sure that it is securely attached. Then plug in and power up again. If the green
LED still does not light, please contact Lynx Customer Support.
5.1 Cable Connections
The LT-TB has been tested with standard optical and copper Thunderbolt cables. For Copper
cable, one can use lengths up to 3 meters (9.8 feet). Optical cables, while somewhat more
difficult to acquire, do promise operation with much longer cable lengths, up to 100 meters.
Thunderbolt cables are somewhat unique in that they contain signal transmission electronics.
For this reason it is important to practice good cable management, avoid crimping or
allowing cables to be compressed. If such practices are adhered to, these cables should
provide many years of faithful service.
5.2 Clock Settings and Connections
Please see Section 2.6: Clock Settings and Connections, of the Aurora User Manual for
information about correct clocking of the Aurora within a digital audio system. With an
active Thunderbolt connection, the SYNC SOURCE can ONLY be changed from the Lynx
Mixer application. Generally, SYNC SOURCE should not be changed while an audio
application is open.
On computer boot, or after restoring a Thunderbolt connection, the Aurora will return to the
SYNC SOURCE of last Mixer state. This will be established by hardware ID, so with
multiple Auroras, even if different SYNC SOURCES are established, all should return to the
appropriate last state. It is critical that the Lynx Mixer application is closed before shutting
down the computer, so that the mixer state can be written to a system file for later recall. If
the computer is turned off while the Lynx Mixer is still open, the prior state may not be
restored.
5.2.1 Using the Internal Clock
We recommend using Internal as the SYNC SOURCE for the best clock performance.
In this state, the Aurora can respond to sample rate changes from audio software, but not all
applications will send these rate change requests.
In all compatible versions of Windows, ASIO applications will generally request sample rate
changes to follow the project sample rate, or the rate of the audio being played.
In Windows 7 and Windows 8, MME/DirectSound applications sample rate requests do NOT
get passed down to the audio driver and hardware. Instead they rely upon Sample Rate
conversion built into the operating system to convert the play rate to the rate of the audio