intference through PA

p.mc · Joined: 28 Jan 2008 Posts: 1

Hi

I use the headphones output from my laptop to send a signal to my desk, but
I get some noisy white noise in the background. I thought it was the
headphone skt at fault, but if I plug my headphones into the skt the noise
isn't there, only when I feed the desk again does the noise re-appear. I
have tried different leads/channels and desks, but the noise is still
there!!

Has anyone else experienced this or know how to resolve this?
I've muted unnecessary channels like SPDIF/AUX in WinXP home volume control
etc etc also, and made sure the sound playback device is from its onboard
sound and not the modem.

Any help would be greatfullyt appreciated.

--
Regards
p.mc

Archived from group: alt>music>karaoke

CJ · Joined: 28 Jan 2008 Posts: 1

It's usually a ground loop problem with laptops. Buy a Behringer HD400 'Hum
Destroyer' (about £11.00 British pounds ... maybe $25 USA). Take a minijack
lead from the laptop output into the HD400 (stereo minijack to two mono
quarter inch jacks) then take two mono jack cables from the HD400 into your
mixer. That should solve your problems.

Regards,

Colin

"p.mc" wrote in message $1_2@mk-nntp-2.news.uk.tiscali.com...
>
> Hi
>
> I use the headphones output from my laptop to send a signal to my desk,
> but I get some noisy white noise in the background. I thought it was the
> headphone skt at fault, but if I plug my headphones into the skt the noise
> isn't there, only when I feed the desk again does the noise re-appear. I
> have tried different leads/channels and desks, but the noise is still
> there!!
>
> Has anyone else experienced this or know how to resolve this?
> I've muted unnecessary channels like SPDIF/AUX in WinXP home volume
> control etc etc also, and made sure the sound playback device is from its
> onboard sound and not the modem.
>
> Any help would be greatfullyt appreciated.
>
>
> --
> Regards
> p.mc
>
>
>

jinny · Joined: 28 Jan 2008 Posts: 2

Or even a Stereo DI box.

On Mon, 28 Jan 2008 18:09:16 GMT, "CJ"
wrote:

>It's usually a ground loop problem with laptops. Buy a Behringer HD400 'Hum
>Destroyer' (about £11.00 British pounds ... maybe $25 USA). Take a minijack
>lead from the laptop output into the HD400 (stereo minijack to two mono
>quarter inch jacks) then take two mono jack cables from the HD400 into your
>mixer. That should solve your problems.
>
>Regards,
>
>Colin
>
>"p.mc" wrote in message
>$1_2@mk-nntp-2.news.uk.tiscali.com...
>>
>> Hi
>>
>> I use the headphones output from my laptop to send a signal to my desk,
>> but I get some noisy white noise in the background. I thought it was the
>> headphone skt at fault, but if I plug my headphones into the skt the noise
>> isn't there, only when I feed the desk again does the noise re-appear. I
>> have tried different leads/channels and desks, but the noise is still
>> there!!
>>
>> Has anyone else experienced this or know how to resolve this?
>> I've muted unnecessary channels like SPDIF/AUX in WinXP home volume
>> control etc etc also, and made sure the sound playback device is from its
>> onboard sound and not the modem.
>>
>> Any help would be greatfullyt appreciated.
>>
>>
>> --
>> Regards
>> p.mc
>>
>>
>>
>