Re: Looping with a PC laptop... which one?

["Doug Cox" <dougcox@pdq.net>]

As I said, I'm an electro-peasant, so I can't answer on the reasons why.
But I can confirm, with my Latitude at least, that it occurs even with an
independent power supply for the USB device.

Doug
----- Original Message -----
From: "Mark Sottilaro" <sine@zerocrossing.net>
To: <Loopers-Delight@loopers-delight.com>
Sent: Saturday, September 27, 2003 12:45 PM
Subject: Re: Looping with a PC laptop... which one?


> Wouldn't get a Latitude.  Don't care if it's that small.
>
> However, what doesn't make any sense to me is this: If I'm using USB
> that doesn't get power from the source of data, there should not be any
> ground issues... no?  The M-Audio Audiophile has it's own powersupply.
> The only link would be the USB data stream, no?  If there was noise on
> that, it would corrupt the signal and be useless.  I could see the
> issue if you were using a USB/Audio device that took power from the
> laptop.
>
> Or, I could be totally wrong.
>
> Mark
>
> On Saturday, September 27, 2003, at 07:25 AM, Doug Cox wrote:
>
> > Mark,
> >
> > *SOME* Dell's have a known issue with the grounding of the power supply
> > jack, which causes hummmm in the USB audio output.  I know for a fact
> > that
> > Latitudes have this problem, but I can't speak for other models.  Dell
> > is
> > very tight lipped about the issue, but when pressed, a good tech
> > support
> > person will tell you that it's a documented problem.  The fix?  Either
> > use
> > the battery, or put a 3-prong -> 2-prong adapter on the power supply
> > cord.
> > Someone can probably explain how that might be dangerous...  I'm an
> > electro-peasant, so I don't know.
> >
> > Personally, if I was starting from scratch, I wouldn't buy a Dell for
> > audio.
> >
> > Doug
> > ----- Original Message -----
> > From: "Mark Sottilaro" <sine@zerocrossing.net>
> > To: <Loopers-Delight@loopers-delight.com>
> > Sent: Saturday, September 27, 2003 3:08 AM
> > Subject: Looping with a PC laptop... which one?
> >
> >
> >> Hey,
> >>
> >> Well, I knew as soon as I got comfy with a laptop I was using, the
> >> owner would want it back (long story, don't ask) so now I'm looking
> >> for
> >> the replacement.  I like Macs, but let's face it, they're pricey.  I
> >> have a nice desktop Mac, and I'm not married to Apple's product line
> >> especially when they're twice as expensive for the base machine.
> >>
> >> SO, I've heard that Jon El-Bizri had issues with a Dell and noise via
> >> USB.  I'm using a USB interface that has it's own power supply, so I
> >> honestly don't know how noise could transfer unless the D/A was
> >> screwed
> >> up in some way.  The USB (M-audio Audiofile) on the TiBook was fine.
> >> Quiet.  My only complaint was it didn't have gain controls.  I say
> >> Dell
> >> because our IT dept swears by them and our people are on the road
> >> using
> >> them for shows all the time so they get banged up.  I guess they have
> >> great service.
> >>
> >> any advise would be appreciated.
> >>
> >> Mark Sottilaro
> >>
> >
>