M-AUDIO DMAN - Manual (Page 20)

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You now have the option of modifying the following resource
settings:
Duplex - Duplex modes determine whether DMAN can support
simultaneous playback and capture (recording). Half duplex
allows both playback or capture, but not at the same time.
Choose this option if your machine has low-performance or there
is only one DMA channel available for use. Full duplex is the
default for the Windows 3.1x drivers and provides simultaneous
capture and playback of audio data at the same sample rate.
Enhanced full duplex allows simultaneous capture and playback
with any combination of 11, 22.05, or 44.1 kHz files (requires
higher-performance CPUs).
I/O Address - This is the base address of the WSS controller
(basically the controller for the D/A and A/D converters).
Changing this Windows WSS setting will also change the related
DOS WSS setting.
DMA Channel - These are the DMA channels used for playback
and capture of digital audio. In half duplex mode, these channels
will be the same. For full and enhanced duplex modes, these
must be set to different values.
IRQ - This is the playback/capture IRQ used by the WSS
controller. Changing this setting will also change the related DOS
WSS setting.
Audio Setup for Computers with PnP
If your computer has a PnP BIOS and it is enabled, you may
modify some of the Windows 3.1x audio driver settings through
the Drivers Applet. First you must select the driver to set up by
highlighting the “DMAN Digital Audio / Mixer Driver” entry,
then press the “Setup” button. The driver setup dialog below will
pop up.