[ddots-l] Re: laptop power problems
- From: "Dave Carlson" <dgcarlson@xxxxxxxxxxxxx>
- To: "ddots List Server" <ddots-l@xxxxxxxxxxxxx>
- Date: Tue, 26 Jan 2010 08:33:49 -0800
Annabel,
At the risk of sounding pedantic, you need to get some grounding in your
electrical if you're serious about audio production. That requires an
electrician to quote you the cost to run those wires in your home.
You also need to read the past messages and make note of the recommendations
from Steve on using audio isolators in the audio cables. These are also
called audio isolation transformers, and also decouplers.
Good luck.
Dave
----- Original Message -----
From: "Annabelle Susan Morison" <foristnights@xxxxxxxxxxx>
To: <ddots-l@xxxxxxxxxxxxx>
Sent: Tuesday, January 26, 2010 07:01
Subject: [ddots-l] Re: laptop power problems
I have a similar situation with the power supply in my computer. I just
found out, that when I'm running some of my music machines, I get this
strange digital grinding noise. I found out that this noise is caused by the
power supply on my computer. The power supply I have is one of those ones
with three prongs, while the electricity in our house is only designed for
two-pronged cords. Since these noises are not something I want to have in my
audio recordings. I found out that by unplugging the power supply from my
computer, it takes the noises away. However, I'm afraid to run the machine
on battery power for more than an hour, since that could make the battery go
dead. What do I do next?
-----Original Message-----
From: ddots-l-bounce@xxxxxxxxxxxxx [mailto:ddots-l-bounce@xxxxxxxxxxxxx] On
Behalf Of Mark Brierley
Sent: Tuesday, January 26, 2010 7:02 AM
To: ddots-l@xxxxxxxxxxxxx
Subject: [ddots-l] Re: laptop power problems
Yep, only joking. Just a nick name for the electricity.
-----Original Message-----
From: ddots-l-bounce@xxxxxxxxxxxxx [mailto:ddots-l-bounce@xxxxxxxxxxxxx] On
Behalf Of Darren H
Sent: 26 January 2010 14:36
To: ddots-l@xxxxxxxxxxxxx
Subject: [ddots-l] Re: laptop power problems
I think he was joking.
Cheers
Darren If you like electronic, ambient, new age or atmospheric music, become
a fan of The Karmistry Project on Facebook...
http://facebook.karmistryproject.com
You can also follow Karmistry Media on Twitter...
http://www.twitter.com/Karmistrymedia
----- Original Message -----
From: "Annabelle Susan Morison" <foristnights@xxxxxxxxxxx>
To: <ddots-l@xxxxxxxxxxxxx>
Sent: Tuesday, January 26, 2010 2:29 PM
Subject: [ddots-l] Re: laptop power problems
> Messing around with the lightning? That's interesting. What do you mean by
> that?
>
> -----Original Message-----
> From: ddots-l-bounce@xxxxxxxxxxxxx [mailto:ddots-l-bounce@xxxxxxxxxxxxx]
> On
> Behalf Of Mark Brierley
> Sent: Tuesday, January 26, 2010 4:45 AM
> To: ddots-l@xxxxxxxxxxxxx
> Subject: [ddots-l] Re: laptop power problems
>
> Hi Steve,
>
> I shall definitely try that. Sounds a lot safer than messing around with
> the lightning!
>
> Thanks
>
> Mark
>
> -----Original Message-----
> From: ddots-l-bounce@xxxxxxxxxxxxx [mailto:ddots-l-bounce@xxxxxxxxxxxxx]
> On
> Behalf Of Steve Wicketts
> Sent: 26 January 2010 09:39
> To: ddots-l@xxxxxxxxxxxxx
> Subject: [ddots-l] Re: laptop power problems
>
> Hi Mark,
>
> My lap top was also built for me purely as a music computer.
> The thing about lap tops is, Some of the circuitry is not insulated that
> well which can caurse audio noyce.
> Tthis happens even on expensive lap tops as they are not quite as
> inserlated
>
> as say a PC.
>
> It was a high noice I was getting on my lap top, it also would disappear
> when using the battery power.
> I simply plut the male phonos from the Ground Loop Iserlater into the
> audio
> outs on my Fast Track Pro Sound card then plug the audio cables that go to
> my mixer into the female phonos on the Ground loop iserlater.
> I'm almost certain a Ground loop icerlater will work.
>
> Try this first before messing with electrics.
>
> Steve W
>
>
> ----- Original Message -----
> From: "Mark Brierley" <mark.brierley@xxxxxxxxxxxxx>
> To: <ddots-l@xxxxxxxxxxxxx>
> Sent: Tuesday, January 26, 2010 9:03 AM
> Subject: [ddots-l] Re: laptop power problems
>
>
>> Hi Dave,
>>
>> Many thanks to you and all the others for the ideas.
>>
>> I'm not sure whether Steve's solution would work as my laptop is
>> connected
>> via firewire to an FW1884.
>>
>> Like you, i'm pretty sure its not a ground loop. The frequency of the
>> noise
>> is far too high for that. I'm using a 3 pin plug as i'm over in the UK.
>> I've tried plugging it in on the same outlet as my mixer and speakers
>> etc.
>> I have also tried to plug it in in another room, but the problem
>> persists.
>>
>> I'm not subscribing to the midi mag list at the moment. I however will
>> try
>> your other suggestions, and would like to thank you all again for your
>> help.
>>
>> Cheers
>>
>> Mark
>>
>> -----Original Message-----
>> From: ddots-l-bounce@xxxxxxxxxxxxx [mailto:ddots-l-bounce@xxxxxxxxxxxxx]
>> On
>> Behalf Of Dave Carlson
>> Sent: 25 January 2010 18:10
>> To: ddots-l@xxxxxxxxxxxxx
>> Subject: [ddots-l] Re: laptop power problems
>>
>> Mark,
>>
>> Follow-on. Dennis' suggestion of the power outlet brings up a couple
>> other
>> thoughts.
>>
>> 1. Make sure your power outlet (ac mains) is truly grounded and. If your
>> ac
>> mains plug for the power supply is a two-prong plug, then make sure
>> you've
>> got it plugged in with the correct polarity.
>>
>> 2. Make sure that you plug your power supply into the same outlet (or at
>> least the same circuit) as your mixer, keyboard, and other audio gear, so
>> that they are all on the same phase of the feed power coming in to your
>> building breaker box. If you connect equipment to two different phases of
>> the power input (two different circuit breakers) you can have a voltage
>> differential between the neutral and/or hot lines.
>>
>> Dave
>>
>>
>> ----- Original Message -----
>> From: Mark Brierley <mailto:mark.brierley@xxxxxxxxxxxxx>
>> To: ddots-l@xxxxxxxxxxxxx
>> Sent: Monday, January 25, 2010 08:54
>> Subject: [ddots-l] laptop power problems
>>
>>
>> Hi list,
>>
>>
>>
>> Just a quick question which might be very difficult to answer!
>>
>>
>>
>> I've bought a new laptop for my pro audio setup. The laptop is custom
>> built
>> by Music PC in the UK. I plugged it all in with my gear over the
>> weekend,
>> and get a horrendous high pitched noise over my speakers and mixer. It
>> is
>> quite clearly the power supply, as when the laptop is running on
>> batteries,
>> there is no noise at all. I have had this problem a couple of times when
>> out doing live shows, but never really found the solution.
>>
>>
>>
>> Am I right in saying that it isn't a ground loop? It is my understanding
>> that ground loops are at a far lower pitch. If anyone has got any ideas
>> on
>> how to get rid of this horrible noise, I would be very grateful.
>>
>>
>>
>> Many thanks
>>
>>
>>
>> Mark
>>
>>
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