Channel Count Under Wdm; Multi-Client Operation - RME Audio HDSPe MADI User Manual

Note 1: Selecting the MADI to be used as system playback device is against our recommenda-
tion, as professional interfaces should not be disturbed by system events. Make sure to re-
assign the selection after usage or to disable any system sounds (tab Sounds, scheme 'No au-
dio').
Note 2: The DVD player will be synced backwards from the MADI. This means when using Au-
toSync and/or word clock, the playback speed and pitch follows the incoming clock signal.

9.3 Channel Count under WDM

The HDSPe MADI allows to use sample rates of up to 192 kHz. For this to work single-channel
data is spread to two or four channels using the Sample Multiplexing technique. This reduces
the number of available MADI channels from 64 to 32 or 16.
Whenever the HDSPe MADI changes into Double Speed (88.2/96 kHz) or Quad Speed mode
(176.4/192 kHz) all devices no longer available vanish automatically.
WDM
MADI (1 to 16)
MADI (17 to 32)
MADI (33 to 64)
The Phones output always plays the last two channels respective to the current sample rate:
63/64, 31/32 or 15/16.

9.4 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. 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 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.
20
Double Speed
MADI (1 to 16)
MADI (17 to 32)
MADI (33 to 64)
User's Guide HDSPe MADI © RME
Quad Speed
MADI (1 to 16)
MADI (17 to 32)
MADI (33 to 64)