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Subject:Reducing clicks and reducing background hum and whine
Posted by: keether
Date:3/26/2003 11:30:23 AM

I can remove clicks on waveforms manually when I see them, although of course this results in a microscopic change in the length of the track. That's of no importance at my level of sophistication: I'm just trying to preserve old family records and tapes. I can't eliminate clicks that are hidden inside the waveform

Background hum and whine are something else.

Does SF Noise Reduction 2.0 detect and remove even hidden clicks? Can it remove the hum and the painful whine? And does Sonic Foundry let us trial-download Noise Reduction? I've not been able to find this trial version although it seems to be offered. Please advise.

Subject:RE: Reducing clicks and reducing background hum and whine
Reply by: Chienworks
Date:3/26/2003 3:08:45 PM

http://www.sonicfoundry.com/download/step2.asp?DID=6

This is the page where you can download the trial version of Noise Reduction. I've always registered my copy immediately upon installing it so i don't know exactly what the limitations are. I seem to recall it's either 15 days or 20 uses or something like that. If you do decide to purchase and register it, you won't have to download anything else. Simply enter the activation code you're given after purchasing and it unlocks it to unlimited use.

Noise Reduction is particularly good at constant hums and hisses. I've had some pretty good success with clicks as well. Of course, it works best when it doesn't have to do much work. If the click is hidden inside areas with a complex wave form that rivals the intensity of the click then it may be impossible to fix it. On the other hand, these are the times when clicks are least noticeable anyway. The most objectionable clicks occur during peaceful quiet sections of the music and this is when Noise Reduction is most effective in eliminating them.

The whine you refer too, is that from older cassette tapes? Often these tapes will get sticky after sitting for long periods and rub against the inside of the cartridge causing them to vibrate. Fast forwarding and rewinding a couple of times may help this condition far more than computer processing could. In a few extreme cases, i've bought a high grade blank cassette, opened it up, chucked the blank tape inside, and placed the old tape in this new cartridge. This works very well as long as you're reasonably careful and keep it clean and untangled. While Noise Reduction can help somewhat, it's not very useful on noise that comes and goes. Using EQ to notch out the frequency of the whine might help more instead.

Subject:RE: Reducing clicks and reducing background hum and whine
Reply by: keether
Date:3/26/2003 6:35:31 PM

Thank you for that.

I'll go through the motions again, in case I did something wrong---but last time I "installed" this downloadable trial file I couldn't find nor use the program and decided nothing had actually downloaded.

So please tell me where I look to find the menu item (or whatever) that will perform a "noise reduction" on a .WAV file I've opened in Sound Forge Studio 6.

Subject:RE: Reducing clicks and reducing background hum and whine
Reply by: MJhig
Date:3/26/2003 8:01:58 PM

Ah, Studio does not support DirectX plug-ins

Wow, SOFO, I thought I was somewhere else when I could see the post I was replying to! Nice touch.

MJ

Subject:RE: Reducing clicks and reducing background hum and whine
Reply by: keether
Date:3/26/2003 10:00:01 PM

Aha! it all becomes clear. Turns out I'm not an idiot--just had the wrong program. I now have to convince certain other parties that SF 7 is worth buying, when it arrives.

Thank you all.

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