Gremlins Emerge with Switch to Windows 7

Al,

Thank you and I know you are very good on this topic.

I will do more testing, but for starters, I just turned on Pandora, which I use with a Pandora One subscription for higher resolution.

And yes, I did immediately unplug the AC adapter, wondering if the battery alone might improve things but it did not.

The "upgrade" was nothing exotic - only to a Lenovo X201 which has a faster 1.66 chip and 8gb of memory, compared to my Lenovo S10 netbook which has an Intel Atom and only 1 gb of memory.

The only obvious difference is Windows 7 and hence my suspicion. As for settings on the computer, thats what I need to figure out.

I did not immediately recognize the audio settings compared to XP where you basically just select the USB audio device you want to use and off you go.

The sound was distorted and also had repeated tics or pops - a skipping sound.

Thanks for any ideas.

Ever think that they skimped on the audio card? I know that new HP's that is a real problem. I've got a massively fast HP but the sound is crap compared to an older unit. I ended buying an external DAC. The internal is so bad that I don't even want to listen with headphones.

CW -- Ok, that does sound like something that is settings related.

I recall seeing a number of reports of similar symptoms with USB audio under Windows 7, which, depending on the specific computer, were resolved by disabling certain power saving features. Modern processors and motherboards have features which dynamically vary both cpu speed and cpu voltage depending on how busy the cpu is. Apparently that switching can sometimes introduce glitches into audio that is being sent out via usb, depending on the specific computer's hardware design.

Try going to Start/Control Panel/Hardware & Sound/Power Options, and selecting "High Performance."

Also, next to where it says "High Performance," go to "Change Plan Settings" and then "Change Advanced Power Settings." Expand the + sign next to "Processor Power Management," and under that expand the + signs next to "Minimum Processor State" and "Maximum Processor State." Set them both to 100% if they are not presently set that way.

If that doesn't help, you can restore the original default settings on the page that appeared after you clicked "Change Plan Settings."

There are probably also some power saving features that can be enabled or disabled in the computer's bios. As you may realize, the bios is entered at startup, before Windows starts to load, by pressing some keyboard key that is probably specified in the computer's manual.

Hope that helps,
-- Al

Elizabeth,

I like to have everything on one machine, and as a frequent participant in the forums, you should know that "audiophiles" often have a compulsion to buy and configure new hardware whether or not an older device works properly.

In addition, my netbook has been on for 8-16 hours a day for about two years, and dropped in the driveway a couple of times when rushing to work. So overdue for a new machine.

Elevick, yes, I don't even think about internal sound cards - all my audio goes out via USB into my Behringer DEQ2496 and/or an Audio Research DAC 5 at the moment. For headphones, I use a NuForce DAC which sounds pretty good.

As Al points out, however, there are still settings to configure the audio which can affect the sound.

Al - thanks and I will also check the system and power usage settings.

At the moment, the Sound shortcut can see that my playback device is "SPDIF Interface" which I don't think is strictly true since I am using optical out via a Behringer interface box to the Behringer DAC.

But somehow sounds pretty good this morning, so when in doubt: reboot.

Still there are things that bug me. If I right click on the SPDIF Interface icon and choose properties, there is a "Levels" tab which seems to function as a volume control.

This is counterintuitive to me as I am trying to export bits, not levels.

I will post more as I learn if any other Windows 7 users might be interested.