Focusrite clarett octopre, Руководство пользователя

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Digital Inputs
Use the OPTICAL IN ADAT port(s) [19] if you need to convert digital audio (e.g., the output of a DAW)
to analogue, using the Clarett OctoPre’s ADAT
>
LINE mode.
The right-hand port can receive eight channels of audio at 44.1 kHz or 48 kHz sample rate via a single
optical cable.
At 88.2 kHz or 96 kHz sample rates, each port can receive four channels of audio. The right-hand
port carries Channels 1 to 4, the left-hand port carries Channels 5 to 8; thus two TOSLINK cables are
required to receive all eight channels.
At 176.4 kHz or 192 kHz sample rates, each port can receive two channels of audio. The right-hand
port carries Channels 1 and 2, the left-hand port carries Channels 3 and 4. The OctoPre is restricted
to four channels of digital audio at these sample rates.
Use the SAMPLE RATE switch [9] to select the desired frequency. It is essential that the sample rate
selected on the Clarett OctoPre matches the sample rate set on the transmitting digital device.
AIR mode
An important feature of all models in the Clarett range is the new design of analogue preamplifier.
The circuitry now includes a new AIR function, individually selectable on each channel. AIR subtly
modifies the pre-amp’s frequency response to model the impedance and resonance characteristics
of Focusrite’s classic transformer-based ISA mic preamps. When recording with good quality
microphones, you will notice an enhanced clarity and definition in the important mid frequency
range, just where it is most needed for vocals and many acoustic instruments.
Inserts
Each pre-amplifier channel includes a switchable insert point for the connection of external
processing equipment such as compressors or noise gates. The insert comprises a send (the output
of the channel’s input stage) and a return (an input to the channel’s output stage): with no plug
in the INSERT socket, the channel signal path is uninterrupted. The insert send and return are
both unbalanced. Use a TRS jack wired with the tip (return) and ring (send) of the jack wired to two
separate cables; such cables (often referred to as ‘Y-cables”) are available from professional audio
suppliers.
The insert point is post the AIR circuitry (thus external equipment will receive a signal modified by
AIR), and also post the front panel GAIN controls [4]. When using an insert point, try to adjust the
input and output levels of the external processor so that the return signal is about the same level
as the send. If the external processor has too much gain, you run the risk of overload within the
OctoPre, so use the channel meters [7] to check the return signal level.
RING (send)
TIP (return)
SLEEVE
RING (send)
TIP (return)
SLEEVE
With no jack inserted into the
INSERT socket the channel
path is uninterrupted.
INSERT socket
With aTRS jack inserted into
the INSERT socket:
Ring is insert send
Tip is insert return
INSERT socket
TRS jack (Y-cable)
Use the front panel INSERT/AIR buttons [6] to enable the insert point. (First select INSERT using the
master switch [8].) The channel LED will illuminate green to confirm selection.