Manual UC1 © Grimm Audio
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LS1’ mode, reset the unit to factory default by only pressing
the top button during startup.
The word clock in- and outputs are 75 Ohm terminated.
The UC1 clock circuitry is of similar reference quality as
that of our CC1 and CC2 master clocks. If you use more
than one audio interface with your computer, we
recommend to make the UC1 master and slave the
extra device via word clock.
To use multiple interfaces in Macintosh computers you
need to make an “Aggregate Device” in the ‘Audio Midi
Setup’ app, which combines the inputs and outputs of
all devices. For more information read
https://
support.apple.com/en-us/HT202000
. In Windows
systems it is more complicated. ASIO does not support
aggregated devices unfortunately. The workaround is to
use the
ASIO4ALL
driver that can combine USB Audio
Class 2 devices such as the UC1 and present them as
one ASIO device. For more information visit
https://
www.asio4all.org
.
The UC1 can slave to word clock, Digital in 1 and Digital
in 2. This enables you to monitor and record digital
sources that cannot be slaved to the UC1 word clock
output such as CD players or digital guitar modellers.
Mark that S/PDIF sources can be connected via an S/
PDIF to AES adapter cable (that can be found in the
Grimm Audio webshop).
The PLL that synchronizes the UC1’s internal clock to the
external clock is of a very special kind. It achieves lock
very fast and then gradually increases its jitter
suppression down to very low jitter frequencies,
effectively only following very slow drift of the source
clock. This proprietary ‘Hybrid PLL’ technology offers the
best of both worlds: instant lock so there is no gap when
switching sample rates, and high jitter suppression as
well. Standard PLL’s will either lock fast or offer high
jitter suppression.
The UC1 has two digital stereo inputs. Please note that
your DAW can only record data from these sources if
they are synchronous with the UC1 clock. To achieve
this, you can slave the UC1 system to digital input 1 or 2,
4.
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