M-AUDIO DMAN - Manual (Page 44)

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Typical DMA Assignments
DMA
Channel
IBM PC Assigns This Channel To:
0 Available
1 Available
2 Floppy Disk
3 Available
4 (16-bit) Hard Disk -- DMAN unable to use this channel.
5 (16-bit) DMAN unable to use this channel.
6 (16-bit) DMAN unable to use this channel.
7 (16-bit) DMAN unable to use this channel.
Problem: No Sound.
Possible Cause 1: Volume control adjustment. There are two volume
controls that affect the sound level of each audio device (Mix Level and
Master Volume) -- make sure neither is set too low.
Possible Cause 2: Improper connections of the audio accessories. Verify
that the Line Out is properly connected to a headset or external
mixer/amplifier. Also check your audio source and verify that its levels
are turned up and it is properly connected to DMAN.
Possible Cause 3: There is a resource conflict with one or more other
devices in your computer. This is more evident during the recording
and playback of digital audio rather than the Line In, Mic In, and Aux In.
Check the DMAN configuration (address, IRQ, and DMA channel(s))
against those of the other devices on your computer. If necessary,
change the settings for the one or more of the devices.
Problem: Cannot Play/Cannot Capture Digital Audio.
Possible Cause: DMA Channel conflict. Check that no other devices in
your system are attempting to use the same DMA channel(s) as DMAN.
Change DMA channels. You might also switch to half duplex mode,
which requires a single DMA channel. If the condition subsides you will
know which DMA channel was in conflict.
Problem: No visual activity on Audio Input volume (VU) meter.
Possible Cause 1: Wrong input (mic, line, synth, loop) selected.
Possible Cause 2: DMA Channel conflict. See above.
Problem: Repetitious Sound.
Possible Cause: Wrong IRQ. Often this will result in a small segment of
sound (0.5 to 1 second) repeating itself over and over, sometimes
completely locking up the computer. If this problem occurs in Windows,
open the driver configuration dialog box and set the IRQ to match the
current DMAN setting. If this problem is in DOS, reconfigure the IRQ in
the DOS application itself to match that of DMAN.