How exactly does this work?

[oicdn]

I googled and couldn't find anything.

My laptop (Toshiba A105-S4344) has this audio feature that "quiets hiss and other audible interference". I haven't tried out the sound, as I'm still removing alot of the crap that comes pre-installed, as well as installing some of the programs from this computer.

What I'm curious on, is HOW it works, in that, will it affect signal when amplified, and if it they can dampen the noise, why don't they just leave it that way to begin with instead of being able to switch it on and off?

Thinking it may just be another useless feature...but it has peaked my intrest....

 

[Ingo]

Quote:

Originally Posted by oicdn /img/forum/go_quote.gif I googled and couldn't find anything. My laptop (Toshiba A105-S4344) has this audio feature that "quiets hiss and other audible interference". I haven't tried out the sound, as I'm still removing alot of the crap that comes pre-installed, as well as installing some of the programs from this computer. What I'm curious on, is HOW it works, in that, will it affect signal when amplified, and if it they can dampen the noise, why don't they just leave it that way to begin with instead of being able to switch it on and off? Thinking it may just be another useless feature...but it has peaked my intrest....

This thread piqued my interest.

I'm betting that feature is going to mess with the frequencies even before it's crappy onboard gets to mangle them. Try it out and see what you think, though. You never know, it could be the noise reduction miracle we've all been praying for.

 

[oicdn]

It'll be tomorrow morning before parts of my HD is ported over...I just started the entire process an hour ago. Kinda sucky...I didn't listen to my inner child, I shoulda stayed home when it showed up, instead of going out.

Intresting feature though. It has it's own program in teh add/remove programs list. So it's not a hardware feature, atleast not 100% atleast.

 

[jmmtn4aj]

This feature has been in Creative's mediasource (or whatever it's called) program since wayyyy back. Mediasource is bundled with all their soundcards. Basically all it is an algorithm that tries to guess what is background noise, and what is supposed to be part of the music, in order to clean it. Automatically cleaning a track obviously will never be as good as manually editing out the hisses.

 

[oicdn]

Well, the difference isn't really noticeable as the soundcard in general on this laptop sound veiled. But when I listed REALLY hard, it was pretty much only noticeable on the quieter/lower volumed areas. I couldn't really discern it being on or off when unamped going to the KSC75's, but when it was amped, it was slightly audible. This laptop runs extremely quiet to begin with, so I wasn't expecting much of a difference anyways.

I wish this were on my desktop though...that thing is a BEAST when it comes to audible noise, so it might have been more discerning...

 

[kstephens]

Many noise reduction techniques work by using phase relationships within the waveform,

ie, before you play the sound it will reverse the song etc using phase cancellation then will recognise the interference coming in as spikes in the phase cancelled audio, it will then precede to flip the phase back which in turn cancels out most noise

It shouldnt affect anything other than unwanted audio interference!You may hear a slight lowering in volume depending on how much interference you have.