User:PeterSampson/Sand-Box

Gale 22Oct13: Personals like "I" and "my" are inappropriate in the Manual especially if they appear to be criticising Audacity as this comment is. See also the settings advice on the Wiki ( http://wiki.audacityteam.org/wiki/Noise_Removal#Improved_Noise_Removal_in_current_Audacity ). If you want this in then you need to rewrite it impartially (an "example" is appropriate for this IMO, but it does not seem much of an "example" with only two settings changed. Why not make an example (using the agreed example div) of a lot of noise within the music, where pushing the sensitivity slider up is the key? This seems to be the more common complaint about current noise removal - or isn't it?

• Steve 22Oct13: Fwiw, I agree that personals like "I" and "my" are inappropriate for the manual, but I don't agree that the comment is being (negatively) critical of Audacity.
• Peter 23Oct13: I basically agree with the de-personalization and have implemented that re-organizing this note considerably in the process. I removed the image as I felt that added little. Can we use Steve's fuller anecdotal style note as a note on the Wiki page?
  This note came about from a side discussion (re tinkly artifcats in NR) on a current thread of Paul L's on the forum, it led to Steve suggesting some alternative settings for me (I know Steve and I know his work so basically I trust his judgment. Accordingly I was prepared to invest some time testing Steve's versus default settings. On the three use cases which are my typical workflow, Steve's settings gave superior results:
  1. Removal of FM hiss
  2. Removal of web-stream carrier noise
  3. hum removal - a small amount of hum has crept into my TT/arm on one channel which I can't seem to fix

Since these three are all fairly common use cases I would prefer this note to stand as-is.

Alternative settings

Some users find the default settings in Noise Removal a bit too aggressive in that they can produce tinkly artifacts.

• Noise Reduction (dB): try setting this to about -12, it will still have an appreciable effect on low level noise, but will produce much lower tinkly artifacts than the default setting.
• Frequency Smoothing (Hz): try increasing this a little, typically to around 500 Hz.
• Sensitivity control (dB): reducing this can further help to make the effect less aggressive, but is a bit tricky to use effectively. It is usually best left at the default 0.0 dB.

For critical work it is best to experiment for optimum settings; see this page in the Wiki for further advice on using the settings for this effect.

Many users require the settings to be quite aggressive so as to have some impact on bad recordings so the default settings are fine for them.