MOTU UltraLite-mk4, Руководство пользователя

Страница: 34 / 94

H A R D W A R E I N S T A L L A T I O N
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Quarter-inch outputs can be trimmed in the DAC
itself. Range is 24 dB. The Main Outs and Phones
provide full trim range from 0 dB to -
∞
(-127).
Trim controls are most easily accessed in the web
app. See “Device tab” on page 12. Trim settings can
also be accessed in the LCD menu.
Optical I/O
The UltraLite-mk4 provides ADAT optical
(“lightpipe”) connectors (one input and one
output). Together, they provide 8 channels of
ADAT optical digital I/O at 44.1 or 48 kHz, or 4
channels of SMUX optical at 2x sample rates (88.2
or 96 kHz). SMUX operation supports two modes
(item #21 on page 13):
■
Standard — for 2x optical connection to
3rd-party SMUX-compatible hardware products.
■
Type II (Legacy)
— for 2x optical connection to
legacy MOTU products that are equipped with
optical ports and support 2x operation.
The optical ports are disabled when the interface is
operating at a 176.4 or 192 kHz.
TOSLink (optical S/PDIF)
Alternately, the optical ports can be configured for
stereo TOSLink (optical S/PDIF) in the web app
(item #21 on page 13). The optical IN and OUT
banks can be configured independently.
Choosing a clock source for optical connections
When connecting an optical device, make sure that
its digital audio clock is phase-locked (in sync
with) the UltraLite-mk4. There are two ways to do
this:
A. Resolve the optical device to the UltraLite-mk4
B. Resolve the UltraLite-mk4 to the optical device
For A, choose Internal (or anything other than
Optical ) as the clock source in the Device tab (item
#13 on page 12). Then configure the other device
to resolve to its optical input.
For B, choose Optical as the clock source (item #13
on page 12), and configure the other device to
resolve to its own internal clock.
S/PDIF
If you make a S/PDIF digital audio connection to
another device, the UltraLite-mk4 must be
digitally synced with the other device for a clean,
click-free digital audio stream between them.
DAT decks and other devices with S/PDIF digital
I/O will sync to the UltraLite-mk4 input via the
S/PDIF connection itself. Just connect it to the
UltraLite-mk4 S/PDIF output connector. When
the device records a digital audio signal (from the
UltraLite-mk4), it will simply synchronize to the
clock provided by the signal.
When you transfer audio from the S/PDIF device
into the UltraLite-mk4, you’ll have to resolve the
UltraLite-mk4 to its S/PDIF input.
Figure 4-2: The setup for synchronizing a S/PDIF device with the
UltraLite-mk4. Sync is achieved via the digital I/O connection itself. In
this case, you have to choose S/PDIF as the UltraLite-mk4’s clock
source when recording from the other device.
S/PDIF
S/PDIF device
UltraLite-mk4
UltraLite-mk4
Clock Source setting =
Internal (when transferring from the
UltraLite-mk4 to the other device)
UltraLite-mk4
Clock Source setting =
S/PDIF (when transferring from the
other device to the UltraLite-mk4)
S/PDIF