RME DSP System Multiface User Manual

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User's Guide HDSP System Multiface II

9.4 Channel Count under WDM

The HDSP system’s ADAT optical ports allow to record sample rates of up to 96 kHz using a
standard ADAT recorder. For this to work single-channel data is spread to two ADAT channels
using the Sample Multiplexing technique. This reduces the number of available ADAT channels
from 8 to 4.

When the HDSP system changes into Double Speed (88.2/96 kHz) mode the ADAT devices 5/6
and 7/8 are still found in the list, but no longer functional.

WDM Stereo device

Double Speed

Analog (1+2)

Analog (3+4)

Analog (5+6)

Analog (7+8)

SPDIF

ADAT 1 (1+2)

ADAT 1 (3+4)

ADAT 1 (5+6)

ADAT 1 (7+8)

Note: Under Vista/7 the analog outputs 1/2 show up as Loudspeaker.

9.5 Multi-client Operation

RME audio interfaces support multi-client operation. Several programs can be used at the same
time. The formats ASIO and WDM can even be used on the same playback channels simulta-
neously. As WDM uses a real-time sample rate conversion (ASIO does not), all active ASIO
software has to use the same sample rate.

However, a better overview is maintained by using the channels exclusively. This is no limitation
at all, because TotalMix allows for any output routing, and therefore a playback of multiple soft-
ware on the same hardware outputs.

Inputs can be used from an unlimited number of WDM and ASIO software at the same time, as
the driver simply sends the data to all applications simultaneously.

RME's sophisticated tool DIGICheck is an exception to this rule. It operates like an ASIO host,
using a special technique to access playback channels directly. Therefore DIGICheck is able to
analyse and display playback data from any software, no matter which format it uses.