Channel Count Under Wdm - RME Audio Hammerfall HDSPe AIO User Manual

The program Sonar from Cakewalk is unique in many ways. Sonar uses the so called WDM
Kernel Streaming, bypassing the WDM mixer, thus achieves a similar performance to ASIO.
Because of the driver's multichannel streaming ability (option Interleaved, see chapter 12.2),
Sonar not only finds the stereo device mentioned above, but also the 8-channel interleaved
devices, and adds the channel number at the end:
AIO ADAT (1+2) is the first stereo device
AIO ADAT (3+4) is the next stereo device
AIO ADAT (1+2) 3/4 are the channels 3/4 of this 8-channel interleaved device.
We recommend to not use these special interleaved devices. Also note that it is not possible to
use one stereo channel twice (the basic and the interleaved device), even with different applica-
tions.

12.4 Channel Count under WDM

The HDSPe's ADAT optical interfaces allow to record 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 per ADAT port.
It is nearly impossible to change the number of WDM devices without a reboot of the computer.
Therefore whenever the AIO changes into Double Speed (88.2/96 kHz) or Quad Speed mode
(176.4/192 kHz) all devices stay present, but become partly inactive.
WDM Stereo device
AIO Analog (1+2)
AIO Phones*
AIO Analog (3+4)
AIO Analog (5+6)
AIO AES
AIO SPDIF
AIO ADAT (1+2)
AIO ADAT (3+4)
AIO ADAT (5+6)
AIO ADAT (7+8)
* Phones output, playback only.
Channels 3 to 6 shown above are a result of using the optional AI4S-192 and AO4S-192 Ex-
pansion Boards.
22
Double Speed
AIO Analog (1+2)
AIO Phones*
AIO Analog (3+4)
AIO Analog (5+6)
AIO AES
AIO SPDIF
AIO ADAT (1+2)
AIO ADAT (3+4)
AIO ADAT (5+6)
AIO ADAT (7+8)
User's Guide HDSPe AIO © RME
Quad Speed
AIO Analog (1+2)
AIO Phones*
AIO Analog (3+4)
AIO Analog (5+6)
AIO AES
AIO SPDIF
AIO ADAT (1+2)
AIO ADAT (3+4)
AIO ADAT (5+6)
AIO ADAT (7+8)