[ddots-l] Re: external usbcard with sonar on a laptopRe: Re: sonar problem-dropout!

Hey John, the power conditioner I'm talking about has actual filters to cancel unwanted electrical noise. Hope this helps.
----- Original Message ----- From: "John Fioravanti" <fioresq1@xxxxxxxxxxx> 
To: <ddots-l@xxxxxxxxxxxxx>
Sent: Wednesday, February 27, 2008 11:51 PM
Subject: [ddots-l] Re: external usbcard with sonar on a laptopRe: Re: sonar problem-dropout! 



Mike: is this powerbar different from a pow conditioner? John
----- Original Message ----- From: "Mike C" <m_dsmusic@xxxxxxxxxxxx> 
To: <ddots-l@xxxxxxxxxxxxx>
Sent: Wednesday, February 27, 2008 11:42 PM
Subject: [ddots-l] Re: external usbcard with sonar on a laptopRe: Re: sonar problem-dropout!
A Ground lifter actually lifts the ground on your device, there by making it more prone to spark damage. I would invest in a powerbar which has the special filters against noise hum. Its going to cost you for the powerbar but in the long run its worth it. Firmen makes a rack mountable version, and its really good. ----- Original Message ----- From: "John Fioravanti" <fioresq1@xxxxxxxxxxx> 
To: <ddots-l@xxxxxxxxxxxxx>
Sent: Wednesday, February 27, 2008 6:12 PM
Subject: [ddots-l] Re: external usbcard with sonar on a laptopRe: Re: sonar problem-dropout! 



Hi: why is that?
----- Original Message ----- From: "Kevin Gibbs" <kevjazz@xxxxxxxxx> 
To: <ddots-l@xxxxxxxxxxxxx>
Sent: Wednesday, February 27, 2008 3:46 PM
Subject: [ddots-l] Re: external usbcard with sonar on a laptopRe: Re: sonar problem-dropout! 



A groundlifter?  Not a good idea in many caes.


-----Original Message-----
From: ddots-l-bounce@xxxxxxxxxxxxx [mailto:ddots-l-bounce@xxxxxxxxxxxxx] On 
Behalf Of John Fioravanti
Sent: Wednesday, February 27, 2008 4:25 AM
To: ddots-l@xxxxxxxxxxxxx
Subject: [ddots-l] Re: external usbcard with sonar on a laptopRe: Re: sonar 
problem-dropout!


Brian: I tried a adapter plug (3 to 2) and I don't have the hum anymore
----- Original Message -----
From: "Bryan Smart" <bryansmart@xxxxxxxxxxxxxx>
To: <ddots-l@xxxxxxxxxxxxx>
Sent: Wednesday, February 27, 2008 4:45 AM
Subject: [ddots-l] Re: external usbcard with sonar on a laptopRe: Re: sonar 
problem-dropout!
A lot of audio interfaces have this hum when they run off of USB power. As you say, this does not happen when the laptop is running off of the battery.
If your interface has its own power cable, then you should use that instead of running off of the laptop's power. In many cases, this will get rid of 
the hum.

Bryan

-----Original Message-----
From: ddots-l-bounce@xxxxxxxxxxxxx [mailto:ddots-l-bounce@xxxxxxxxxxxxx] 
On Behalf Of John Fioravanti
Sent: Friday, February 22, 2008 6:31 AM
To: ddots-l@xxxxxxxxxxxxx
Cc: midimag@xxxxxxxxxxx
Subject: [ddots-l] external usbcard with sonar on a laptopRe: Re: sonar
problem-dropout!

Hi: When I plug the usb fast track delta card into a laptop on stage,
there's a terrible hum when I use ac power. The battery stops it. Do any ofyou have this same problem with the usb cards? Should a pci work better? 
John Fioravanti

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