Recording Digital - RME Audio DIGIFACE User Manual

8.2 Recording Digital

Unlike analog soundcards which produce empty wave files (or noise) when no input signal is
present, digital I/O cards always need a valid input signal to start recording.
To take this into account, RME has included two unique features in the Hammerfall DSP
system: a comprehensive I/O signal status display (showing sample frequency, lock and sync
status) in the Settings dialog, and status LEDs for each input.
The sample frequency shown in the Settings dialog (see chapter 9, screenshot Settings) is
useful as a quick display of the current configuration (the board itself and all connected external
equipment). If no sample frequency is recognized, it will read 'No Lock'.
With this configuring any suitable audio application for digital recording is simple. After
selecting the required input, Hammerfall DSP displays the current sample frequency. This
parameter can then be changed in the application's audio attributes (or similar) dialogue.
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 14).
For an automated real-time monitoring function the HDSP System supports ASIO Direct
Monitoring (ADM) in ASIO 2.0. When 'ASIO Direct Monitoring' has been switched on the input
signal is routed in real-time to the output whenever Record is started.
User's Guide HDSP System Digiface © RME
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