Analog Recording; Operation Under Asio; General; Known Problems - RME Audio Hammerfall HDSP 9632 User Manual

12.6 Analog Recording

For recordings via the analog inputs the corresponding record device has to be chosen (HDSP
Analog (x+x)).
The input sensitivity of the analog inputs can be adjusted via the Settings dialog to meet the
most often used studio levels, see chapter 24.1.

13. Operation under ASIO 2.0

13.1 General

Start the ASIO software and select ASIO Hammerfall DSP as the audio I/O device. The 'ASIO
system control' button opens the HDSP's Settings dialog (see chapter 11 / 20, Configuration).
Hammerfall DSP supports
ASIO Direct Monitoring
(ADM). Please note that
currently Nuendo, Cubase
and Logic either do not
support ADM completely
or error-free.
At a sample rate of 88.2 or
96 kHz, the ADAT optical
input and output operate
in S/MUX mode, so the
number of available chan-
nels is reduced from 8 to
4.
In case of a drift between
audio and MIDI, or in case
of a fixed deviation (MIDI
notes placed close before or behind the correct position), the settings in Cubase/Nuendo have
to be changed. At the time of print, the best settings are the use of emulated MIDI driver/ports,
and the activation of the option 'Use System Timestamp'.

13.2 Known Problems

If a computer does not provide sufficient CPU-power and/or sufficient PCI-bus transfer rates,
then drop outs, crackling and noise will appear. We recommend to deactivate all PlugIns to
verify that these are not the reason for such effects.
Additional hard disk controllers, both on-board and PCI based, aften violate the PCI specs. To
achieve the highest throughput they hog the PCI bus, even in their default setting. Thus when
working with low latencies heavy drop outs (clicks) are heard. Try to solve this problem by
changing the default setting of the controller (for example by reducing the 'PCI Bus Utilization').
Another common source of trouble is incorrect synchronization. ASIO does not support asyn-
chronous operation, which means that the input and output signals not only have to use the
same sample frequency, but also have to be in sync. All devices connected to the Hammerfall
DSP must be properly configured for Full Duplex operation. As long as SyncCheck (in the Set-
tings dialog) only displays Lock instead of Sync, the devices have not been set up properly!
When using more than one HDSP system, all units have to be in sync, see chapter 15. Else a
periodicly repeated noise will be heared.
User's Guide HDSP System HDSP 9632 © RME
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