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Problem: Repetitious Sound.
Possible Cause: An IRQ resource conflict. 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. 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 Hardware Settings page of the Delta
Control Panel. "Consumer" can handle hotter signals than "-10." If you find that you are
still clipping at the Consumer setting, 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 1010LT’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: 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 4: 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: The sound from the monitor mixer is muffled. It sounds as if it were
running through a mixer with the treble control turned all the way down!
Possible Cause: The current Delta 1010LT sample rate is too low. The monitor
mixer is a digital device that runs at the current sample rate of the Delta 1010LT board. The
frequency response of the mixer is roughly one-half of the sample rate. There is no way to
prevent this lost frequency response while playing back or recording at a low sample rate.
However, it may be prevented when the system is idle. See the "CODEC SAMPLE RATE"
paragraph of the section ‘Hardware Settings Page’ for more information.
Before You Call Midiman/M-Audio Technical Support
The technical support team at Midiman/M-Audio wants to get you up and
running in an efficient and timely manner. To help us help you, please read the
following before calling technical support.
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