Subject:how to reduce noise

Posted by: marcio

Date:3/1/2001 4:16:52 PM

Please help me.

I accidentely converted my work to 8 bit , 44100 format.
Now I have my work with a lot of noise , even after
converting to 16 bit again and performing a equalization.
Its possible to apply a special filter to reduce this kind
of noise???
Please help me, because if I need to make a new recording ,
I will lost all my charactere animation work!!!

I have Sound Forge 4.0.

Thanks a lot!

Subject:RE: how to reduce noise

Reply by: sreams

Date:3/1/2001 5:15:37 PM

Sonic Foundry's Noise Reduction Plugin would do it... but
it is a seperate purchase.

-S

Subject:RE: how to reduce noise

Reply by: Doug_Marshall

Date:3/1/2001 10:10:30 PM

Much of the time Sonic Foundry's noise reduction plug-in is
near miraculous. But for it to work properly your sound
track must have some "silence" that contains the noise you
want to eliminate. From that a "noise print" is captured
and then this plug-in can do remarkable things.

Subject:RE: how to reduce noise

Reply by: Rednroll

Date:3/2/2001 12:28:12 PM

What you actually did when accidentally converting to 8 bit
was add digital "distortion" to your audio, so that's the
noise you're hearing. You probably want to convert back to
16 bit and then try using the clipped peak and noise
reduction plugin. Fortunately I haven't made this same
mistake, to tell you if it works for sure, and have high
doubts that it will. It's kinda like taking a 72dpi
photoscan and hoping to convert it to 150dpi resolution at
the same size. Works in the reverse order, but not the
other.

Brian Franz

Subject:RE: how to reduce noise

Reply by: sreams

Date:3/2/2001 1:18:14 PM

Actually... distortion is not what is added, and so clipped
peak restoration won't fix it. The difference between 8 bit
and 16 bit is the noise floor. The peaks are still totally
intact, but noise is now at -48db rather than -96db. The
noise reduction plugin should be able to do something with
this.

-S