Originally Posted by Yen
I had a unregulated usb alien with my cheapo Acer and never have a single problem. I am building a regulated one next, but I am pretty sure there will be no difference, or at least any major.
I measured quite stable 4.9-5.0 volts with my DMM.
Originally Posted by MisterX
Are you really suggesting the USB ports on your laptop are not compliant with the appropriate USB specifications?
Yeah, I should note that it is a regulated USB configuration. I think the problem is more that the voltage dips slightly enough to mess up the output of the adjustable regulator than anything else, this particular Alien DAC has worked perfectly on my laptop at home, my media pc, and most of the time on my work laptop. I know with the regulators there is some amount of voltage required over the output voltage and it might just be that it is acting screwy because of that.
Occasionally, I'll plug it in, it detects, but audio comes out distorted for about 2 or 3 seconds before dropping out entirely. Usually it takes a couple tries to plug it in before it works fine. The problem doesn't occur with my wall-powered one.
I should probably just try to lower the output voltage of the reguator, but I really don't want to pay shipping for 1 smd resistor