User’s Guide Hammerfall DSP MADI
© RME
22
13. Operation under ASIO 2.0
13.1 General
We will use Steinberg’s Cubase VST as an example throughout this chapter. All information
provided can easily be adaptated to other programs.
Start the ASIO software
and select ‘System’ from
the Audio menu. Select
'ASIO Hammerfall DSP
MADI' as the audio I/O
device. The 'ASIO
system control' button
opens the HDSP’s
Settings dialog (see
chapter 10,
Configuration).
Hammerfall DSP
supports 'ASIO Direct
Monitoring' (ADM).
When the sample
frequency is set to 88.2
or 96 kHz (Double Speed
Mode), the number of
available channels is
halved.
13.2 Known Problems
In case the used computer has no sufficient CPU-power and/or sufficient PCI-bus transfer
rates, then drop outs, crackling and noise will appear. We also recommend to deactivate all
PlugIns to verify that these are not the reason for such effects.
Unfortunately some newer UltraATA66 and UltraATA100 hard disk controller (also Raid
controller) seem to violate against 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
asynchronous operation, which means that the input and output signals must not only have the
same sample frequency, but they must also 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!