User Manual

User's Guide Fireface UCX © RME

9.4 Channel Count under WDM

The Fireface ADAT optical ports support sample rates of up to 192 kHz using a standard ADAT

recorder. 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.

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

Analog (1+2) Analog (1+2) Analog (1+2)

Analog (3+4) Analog (3+4) Analog (3+4)

Analog (5+6) Analog (5+6) Analog (5+6)

Analog (7+8) Analog (7+8) Analog (7+8)

SPDIF coax SPDIF coax SPDIF coax

SPDIF / ADAT (1+2) SPDIF / ADAT (1+2) SPDIF / ADAT (1+2)

ADAT (3+4) ADAT (3+4) ADAT (3+4)

ADAT (5+6) ADAT (5+6) ADAT (5+6)

ADAT (7+8) ADAT (7+8) ADAT (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.