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RE: USB audio problems



Title: Welcome to the Atlantic Philanthropies

I had problems with my Dell Inspiron 8600 and MOTU828 glitching.  After talking to two Dell customer service guys who couldn’t help, they bumped me up to a Tier 3 guy who immediately told me to run MSCONFIG from the Run menu and turn off all startup items and reboot.  I did so and tried it again and was able to record audio without any glitches into Logic Audio 5.5.  I tried it with a couple of other audio apps such as Ambiloop and no glitching. 

 

I gradually started turning on DLLs while checking for glitches.  It seems that some of the things that run in the background that are automatically installed within Windows by Microsoft or other vendors can cause interrupts.  One way you might be able to see this is to open Task Manger and look at the Performance tab.  If you see spikes happening regularly, then it’s possible that you have a background app that’s causing the problem. 

 

Take a look at www.MusicXP.net for tips on how to fine-tune your PC for audio.  By the way, I’ve tried it since with an Edirol UA25 USB audio/midi device and it works as well when the tweaks are in place.  Hope this helps.

 

Reni

 

-----Original Message-----
From: Devin Smith [mailto:dvidedevo@yahoo.com]
Sent:
Sunday, March 20, 2005 12:42 PM
To:
Loopers-Delight@loopers-delight.com
Subject: USB audio problems

 

Well, for those of you who may recall, I was having glitching/skipping with my Tascam US-122 and Dell Inspiron 2500 (900 mHz Celeron) running XP with 128 megs of ram. This was happening when simply playing a wav or mp3 off of my hard drive, ***not*** under any strenuous system usage.

 

I thought the USB 1.1 ports were causing the problem, so I "upgraded" to a PCMCIA card with USB 2 ports. The glitching is 10 times worse when I plug into the USB 2 ports on the card. Why?

 

Then I thought maybe I have too little ram, and the glitching occurs when the paging file kicks in or something. So I went out and bought two sticks of 256 ram. So I've quatrupled my ram, and guess what... It still glitches just as much.

 

Someone mentioned that Dells of this era may have problems with interference between the power supply and the USB ports. I noticed today that when I plug the power supply in, you can hear some static and radio-type interference coming through the interface. Is this normal? I did plug it into the same power strip as my stereo system if that makes a difference.

 

I just can't figure what it might be. If the wiring of the computer is in fact the problem, than 1. why does the glitching still occur with the PCMCIA card? and 2. why does it occur even when running off of the battery? 

 

Again, any help would be great.

-Devin 


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