Re: [LAU] ladspa - noise removal

Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]
To: <linux-audio-user@...>
Date: Tuesday, May 6, 2008 - 2:01 pm

On Sun, 4 May 2008 15:32:03 +0200
"Emanuel Rumpf" wrote:

> Another noise problem:

What does the noise sound like? Do you have a sample we can listen to, preferable of what should sound like silence so that we know that anything audible is the noise?

There are two obvious routes for noise to enter the system.

1. Induced into the mic lead or even the mic itself if the screening isn't so good. The sources for this can be nearby mains operated equipment, large transformers etc, microwave ovens, mobile phones and doubtless many others.

Make sure the XLR connector is wired correctly, i.e. that the screen in the mic cable is attached to the ground connector.

2. Dirty power from the computer - the PC's internal power lines will have noise on them caused by things that suddenly take extra power, or use less like starting/stopping a hard disk, moving the heads, switching power saving/clock frequencies on the CPU etc. The interface may do a good job of keeping that out of the signal or it may not.

If this second route is the one introducing the noise you may notice that the noise occurs at the same time as some particular activity on the PC itself.

HTH,
Steve.
_______________________________________________
Linux-audio-user mailing list
Linux-audio-user@lists.linuxaudio.org
http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user

Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]

Messages in current thread:
[LAU] ladspa - noise removal, Emanuel Rumpf, (Sat May 3, 7:25 pm)
Re: [LAU] ladspa - noise removal, Ray Rashif, (Sun May 4, 9:18 am)
Re: [LAU] ladspa - noise removal, Georg Holzmann, (Sun May 4, 6:22 am)
Re: [LAU] ladspa - noise removal, cdr, (Sun May 4, 4:19 am)
Re: [LAU] ladspa - noise removal, Emanuel Rumpf, (Sun May 4, 1:32 pm)
Re: [LAU] ladspa - noise removal, Steve Fosdick, (Tue May 6, 2:01 pm)
Re: [LAU] ladspa - noise removal, Rainer Strobel, (Mon May 5, 7:09 am)
Re: [LAU] ladspa - noise removal, Lee Revell, (Sun May 4, 4:08 am)