RME Audio MADIface XT, Руководство пользователя

Страница: 24 / 110

24
User's Guide MADIface XT
© RME
9. Operation under ASIO
9.1 General
Start the ASIO software and
select
ASIO HDSPe FX
or
ASIO MADIface USB
as the
audio I/O device.
MADIface XT supports
ASIO
Direct Monitoring
(ADM).
Its MIDI I/Os can be used
with both MME MIDI and
DirectMusic MIDI.
At a sample rate of 88.2 or 96
kHz (Double Speed mode),
the number of channels avail-
able at the MADI input and
output is halved. At a sample
rate of 176.4 or 192 kHz
(Quad Speed mode), the
number of channels is re-
duced to 16.
Note: When changing the sample rate range between Single, Double and Quad Speed the
number of channels presented from the ASIO driver will change too. This may require a reset of
the I/O list in the audio software.
9.2 Known Problems
If a computer does not provide sufficient CPU-power, and/or sufficient USB or PCI bus transfer
rates, and/or sufficient PCIe-bus transfer rates, then drop outs, crackling and noise will appear.
Raising the buffer size in the Settings dialog of the MADIface XT helps in most cases. It is also
recommended to deactivate all PlugIns to verify that these are not the reason for such effects.
Further information is found in chapter 30.4.
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 MADIface XT
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!
The same applies when using more than one MADIface XT - they all have to be in sync. Else a
periodically repeated noise will be heard.
MADIface XT supports
ASIO Direct Monitoring
(ADM). Please note that not all programs sup-
port ADM completely or error-free. The most often reported problem is the wrong behaviour of
panorama in a stereo channel.
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 option 'Use System Timestamp' should be activated. The
MADIface supports both MME MIDI and DirectMusic MIDI. It depends on the used application
which one will work better.