User's Guide HDSP AES-32 - RME

13. Operation under ASIO 2.0
13.1 General
Start the ASIO software and select ASIO HDSP MADI/AES-32 as the audio I/O device. The
'ASIO system control' button opens the HDSP's Settings dialog (see chapter 11, 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.
Using emulated MIDI drivers
often causes a drift
and delay between audio
and MIDI. You should use
non-emulated (MME) MIDI
ports in such a case.
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').
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.
Another common source of trouble is incorrect synchronization. ASIO does not support asynchronous
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 Settings
dialog) only displays Lock instead of Sync, the devices have not been set up properly!
22 User's Guide HDSP AES-32 © RME