RME Fireface UCX II 40-Channel USB-B Audio/MIDI Interface User Manual

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User's Guide Fireface UCX II

8.3 Channel Count under WDM

The Fireface ADAT optical ports support sample rates of up to 192 kHz. For this to work single-
channel data is spread to two or four ADAT channels using the

Sample Multiplexing

technique.

This reduces the number of available ADAT channels from 8 to 4 or 2 per ADAT port.

Whenever the Fireface changes into Double Speed (88.2/96 kHz) or Quad Speed mode
(176.4/192 kHz) all devices no longer available vanish automatically.

WDM Stereo device

Double Speed

Quad Speed

Fireface Analog (1+2)

Fireface Analog (3+4)

Fireface Analog (5+6)

Fireface Analog (7+8)

Fireface SPDIF

Fireface AES

Fireface ADAT 1 (1+2)

Fireface ADAT 1 (3+4)

Fireface ADAT 1 (5+6)

Fireface ADAT 1 (7+8)

8.4 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. But 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.