M-Audio Delta TDIF Manual page 54

sometimes completely locking up the computer. See the general
troubleshooting suggestions at the beginning of this section.
Problem: I'm getting some pops and clicks in my audio recording.
Possible Cause 1: Input levels are too "hot," causing clipping or
input distortion. Make sure you have the proper signal levels set on the
inputs to the Delta TDIF. If you find that you are still clipping, you will
need to turn down the audio at the source.
Possible Cause 2: If you are recording from the S/PDIF input, but
you have the Delta TDIF's master clock set to something other than the
S/PDIF input, you are recording an out-of-sync S/PDIF stream. This can
result in lost or bogus samples being recorded.
Possible Cause 3: If you are recording from the TDIF input, but
you have the Delta TDIF's master clock set to something other than the
TDIF Clk, you are recording an out-of-sync TDIF stream. This can result
in lost or bogus samples being recorded.
Possible Cause 4: Your application software may not have the
proper audio buffer sizes set. Each software application handles this
differently, but typically there is somewhere in the software's setup to set
the size of the playback and recording buffers used by the application.
Some applications also require you to run a card calibration (sometimes
called "profiling") the first time you use the software with a new audio
card.
Possible Cause 5: Some accelerated graphics cards use excessive
amounts of system bandwidth, preventing the recording buffer of an
audio card from keeping up with demand. This can cause clicks in the
recording. Reducing or turning off the graphics card's graphics
acceleration feature often resolves this problem. In Windows, the level of
graphics acceleration is accessed from Start |Settings | Control Panel |
System | Performance | Graphics.
Problem: I'm getting some pops and clicks in my monitoring signal,
even when my system is idle.
Possible Cause: If the S/PDIF input is not muted in the monitor
mixer, and you have the Delta TDIF's master clock set to something other
than the S/PDIF input, you are monitoring an out-of-sync S/PDIF
stream. This can result in lost or bogus samples being recorded. This can
also occur when using the TDIF input without "TDIF Clk" selected as
you master clock.
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