This was the fix. Worked perfectly. Reset system to use DMA and now it sounds awesome again.
That's the short of it. Here's the story for those who may find it helpful for their own troubleshooting.
The AA1 is my wife's. She's a fitness instructor and uses it for both music and prepping with some videos. She normally uses her earbuds when listening to music on it and she uses a cable from the earphone jack to a sound board when playing music for classes. She rarely uses the built-in speakers.
The problems she began to experience were system slowness and pauses and jitters in audio from both MP3's and Youtube.
She had not experienced any of these problems until the other day when she was prepping a new Zumba (dance workout) routine and we had plugged her AA1 into our new TV with the VGA connector. This was the first time it had been plugged into an external monitor of any kind. We didn't have an audio cable handy to run the sound through the TV so she turned up the volume on AA1 and played the audio through the built-in speakers.
Within a few second of the video (from Youtube) starting, her laptop blue screened. We restarted it and she contnued with her work. Then she noticed the symptoms over the next few days.
She was convinced that using the external VGA connector had caused the crash and the crash had corrupted a file - probably a sound driver. We had not installed any new software for quite a while before that so I wasn't entirely sure that she might not be right.
I ran through all the normal trouble shooting stuff just like everyone else mentioned and then I read this forum. It all sounded familiar until I read the message quoted above. After reading the results that was getting, I decided to try it. But first I read the post that mentioned the speaker being near the HDD. Eureka!
When we had cranked up the volume on my wife's AA1 to play that video, we had EMPed the HDD! (No sniping, I know it not quite the same.) The system blue screened to death and came back as a PIO zombie. Winhlp's anti-PIO zombie elixir was just what was needed.
Regards,
Glenn
ghall_51 at Yahoo!