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12.6 Analog Recording<br />
For recordings via the analog inputs the corresponding record device has to be chosen (H<strong>DSP</strong><br />
Analog (x+x)).<br />
The input sensitivity of the analog inputs can be adjusted via the Settings dialog to meet the<br />
most often used studio levels, see chapter 24.1.<br />
13. Operation under ASIO 2.0<br />
13.1 General<br />
Start the ASIO software and select ASIO Hammerfall <strong>DSP</strong> as the audio I/O device. The 'ASIO<br />
system control' button opens the H<strong>DSP</strong>'s Settings dialog (see chapter 11 / 20, Configuration).<br />
Hammerfall <strong>DSP</strong> supports<br />
ASIO Direct Monitoring<br />
(ADM). Please note that<br />
currently Nuendo, Cubase<br />
and Logic either do not<br />
support ADM completely<br />
or error-free.<br />
Using emulated MIDI<br />
drivers often causes a drift<br />
and delay between audio<br />
and MIDI. You should use<br />
non-emulated (MME) MIDI<br />
ports in such a case.<br />
At a sample rate of 88.2 or<br />
96 kHz, the ADAT optical<br />
input and output operate<br />
in S/MUX mode, so the<br />
number of available channels is reduced from 8 to 4.<br />
13.2 Known Problems<br />
If a computer does not provide sufficient CPU-power and/or sufficient PCI-bus transfer rates,<br />
then drop outs, crackling and noise will appear. We recommend to deactivate all PlugIns to<br />
verify that these are not the reason for such effects.<br />
Additional hard disk controllers, both on-board and PCI based, aften violate the PCI specs. To<br />
achieve the highest throughput they hog the PCI bus, even in their default setting. Thus when<br />
working with low latencies heavy drop outs (clicks) are heard. Try to solve this problem by<br />
changing the default setting of the controller (for example by reducing the 'PCI Bus Utilization').<br />
Another common source of trouble is incorrect synchronization. ASIO does not support asynchronous<br />
operation, which means that the input and output signals not only have to use the<br />
same sample frequency, but also have to be in sync. All devices connected to the Hammerfall<br />
<strong>DSP</strong> must be properly configured for Full Duplex operation. As long as SyncCheck (in the Settings<br />
dialog) only displays Lock instead of Sync, the devices have not been set up properly!<br />
When using more than one H<strong>DSP</strong> system, all units have to be in sync, see chapter 15. Else a<br />
periodicly repeated noise will be heared.<br />
User's Guide H<strong>DSP</strong> <strong>System</strong> H<strong>DSP</strong> <strong>9632</strong> © <strong>RME</strong> 23
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