What Software do You use if You want to reduce noise from an demo or from an Vinyl recording ?
Sometimes it's very difficult, when you don't have some secunds only with noise.
Cool Edit Pro is a great program for this - but be careful that you don't remove too much hiss, otherwise you'll be left with a digital noise in the sound.
Hiss reduction is usually not the best thing to do anyway, because you lose treble.
Bias Soap 2. Maybe even Dart Pro.
No digital noise added/exposed. But as with all these harmful noise reduction utilities, don't go overboard.
Peace,
Adam.
Goldwave is a nice all-round sound editor, with a nice noise reduction tool, but again, be careful with the level of reduction, or you end up with a digital 'wobble' in the background.