Computer Audio Asylum

Music servers and other computer based digital audio technologies.

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RE: USB audio drop outs on XP - every other track. Anyone?

Posted by Old Listener on July 1, 2008 at 16:37:31:
You've tried a lot of stuff. I was not sure reading that list whether you had tried waveout and/or DirectSound as an alternative to ASIO. (If you are using ASIO4All, keep in mind that neither Microsoft or the DAC maker ever tested that path from player s/w to the hardware.)

Some questions:

- What are the specs for your computer system? (CPU, graphics h/w, ram, motherboard) AGP sounds like an old system.

- Are you sending 44.1 KHz / 16 bits to the UCB DAC (in your receiver) or a upsampled rate like 192/24? If you are upsampling, do you hear dropouts when you send 44.1 / 16 out on the USB cable?

- What CPU utilization do you see? Is it low ( < 1o%) or high (> 80%)?

A suggestion: You might start the music player and then bring up task manager. Click on the performance tab and watch the CPU utilization graph. Check to see if a spike occurs at the time when you hear a dropout. If so, then click on the processes tab and then click on "cpu" to sort processes by that measurement. Scroll down so that you are seeing the largest users. Keeping watching through one or two dropouts.

Bill