User’s Guide HDSP System RPM
© RME
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12. Using more than one Hammerfall DSP
The drivers support multiple interfaces and any combination of I/O-boxes. As the RPM does
not include digital interfaces – and therefore no synchronization capabilities - an operation of
multiple RPM will lead to a slow drift of the units. Each RPM uses an internal quartz as time
reference. These quartz are not completely identical. A long-term playback or a recording on
multiple tracks will have deviations in form of small position differences (timing drift).
The RPM can be synchronized to MTC or MIDI clock. In both cases, the used software is
repsonsible for proper synchronization to other devices. In case a project includes audio tracks,
the software must be capable of recalculating the audio data in realtime to the speed of the
MIDI data (Sample Rate Conversion, resampling).
13. Operation under ASIO 2.0
We will use Steinberg’s Cubase VST as an example throughout this chapter. All information
provided can easily be adopted to other programs.
Start the ASIO software
and select ‘System’ from
the Audio menu. Select
'ASIO Hammerfall DSP'
as the audio I/O device.
The 'ASIO system
control' button opens the
HDSP’s Settings dialog
(see chapter 9,
Configuration).
Hammerfall DSP
supports 'ASIO Direct
Monitoring' (ADM).
Please note that some
programs do not support
ADM correctly.
