I'd say this is due to either noisy power-source, or noise from the
hard-drive or similar.

Most likely, you can't filter it out either because it will be in the part
of the sound-spectrum you wish to hear.

    KreAture

----- Original Message -----
From: "Chris Rocco" <crocco@CORP.EARTHLINK.NET>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Sunday, March 02, 2003 1:39 PM
Subject: [EE] Headphone out to RCA line-in converter


> I would like to connect my laptop's headphone jack to my stereo's RCA
> input jack so that I can hear MP3's and video files on my stereo/TV --
> the problem is that I get a hum when I use a direct cable, even when
> there is nothing generating any sound on the laptop.  Is this due to an
> impedance mis-match?  How can I fix it?  I can't seem to find any
> circuits on the Internet, but I'm sure that they must be out there... :)
>
> Thanks in advance,
> Chris
>
> --
> http://www.piclist.com hint: To leave the PICList
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