User`s guide

User's Guide HDSP MADI © RME

13. Operation under ASIO

13.1 General

Start the ASIO software and select ASIO Hammerfall DSP as the audio I/O device.

The HDSP system supports ASIO Direct Monitoring (ADM).

The HDSP MADI’s MIDI I/O 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 available at the

MADI input and output is

halved.

Note

: When changing the

sample rate range between

Single and Double 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 soft-

ware.

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. Raising the buffer size in the Settings dialog of

the HDSP system helps in most cases. We recommend to deactivate all PlugIns to verify that

these are not the reason for such effects.

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. Devices connected to the HDSP MADI

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 HDSP system - they all have to be in sync. Else a

periodically repeated noise will be heard.

RME supports ASIO Direct Monitoring (ADM). Please note that not all programs support 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

HDSP system supports both MME MIDI and DirectMusic MIDI. It depends on the used applica-

tion which one will work better.