Analog Recording; Digital Recording - RME Audio Fireface UCX User Manual

9.6 Analog Recording

For recordings via the analog inputs the corresponding record device has to be chosen (Fire-
face UCX Analog (x+x)).
The input sensitivity of the rear inputs can be changed in three steps in TotalMix (Input Channel
Settings, Level), assuring the highest signal to noise ratio will be achieved. A further optimiza-
tion can be achieved by adjusting the source itself. Raise the source's output level until the
peak level meters in TotalMix reach about –3 dB.
The level of the front-side analog inputs can be optimized via TotalMix (Input Channel Settings,
Level or Gain), or directly at the Fireface UCX by the encoders and the 7 segment display. A
Signal LED and a Clip LED help to find the correct gain value.
Further information is found in chapter 21.
It often makes sense to monitor the input signal or send it directly to the output. This can be
done at zero latency using TotalMix (see chapter 27).
An automated control of real-time monitoring can be achieved by Steinberg's ASIO protocol
with RME's ASIO drivers and all ASIO 2.0 compatible programs. When 'ASIO Direct Monitoring'
has been switched on, the input signal is routed in real-time to the output whenever a recording
is started (punch-in).

9.7 Digital Recording

Unlike analog soundcards which produce empty wave files (or noise) when no input signal is
present, digital interfaces always need a valid input signal to start recording.
Taking this into account, RME added a
comprehensive I/O signal status display to
the Fireface UCX, showing sample frequency,
lock and sync status for every input, and
several status LEDs directly at the unit.
The sample frequency shown in the fields
Clock Mode and Input Status is useful as a
quick display of the current configuration of
the unit and the connected external
equipment. If no sample frequency is
recognized, it will read 'No Lock'.
This way, configuring any suitable audio application for digital recording is simple. After select-
ing the correct input, Fireface UCX displays the current sample frequency. This parameter can
then be changed in the application's audio attributes (or similar) dialog.
User's Guide Fireface UCX © RME
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