Ok, well please bare with me a minute while I try to explain and of course, others may want to chip in here just to clarify what I'm saying. What I'm about to describe is a basic principle of capturing a noise print and this procedure pretty much applies to most Noise Reduction plug-ins whether that be with Sound Forge, total Recorder or whatever. Now the first thing to try and determine is whether capturing a noise print is going to help you with your noise reduction work. If the noise is a constant type of noise such as background tape hiss or an air conditioning system then capturing a noise print should do just fine. The next thing to do is to select a portion of your recording where an obvious bit of the noise you wish to remove exists, for instance a blank passage on a sample made from a cassette tape where only the tape hiss may be heard, such portions can be found say between audio tracks. Select a portion of this tape his (about half a second will be more than enough) and then enter your noise reduction system or plug-in. In the options you'll see a "capture noise print" check box or button, check this box. You'll then see a value which reflects the duration of the print to be captured, this is usually set to 250MS and that should be enough (about a quarter of a second). Next press the "preview" button or check-box, you'll hear the portion of sound you selected earlier played and (if all goes well) the level of the hiss should be reduced. Next, save the captured noise print settings to a file so you can use them again, say "tape hiss", all plug-ins I've used allow the saving of such preset files for later use. Now, exit out of the plug-in and select all your recording with the select all command. Go back into your noise reduction plug-in and load the preset you just saved,. Press the "preview" button to hear what your recording will sound like with the settings applied to remove hiss (you may need to press the "capture noise print" button again, it very much depends on your system you're using but it should be ok). Compare the differences in the recording by checking and then unchecking the "bypass" button, this bypasses the plug-in. Adjust the DB setting where appropriate to increase or decrease the level of noise removal. When satisfied press the "ok" or "apply" button. Notes: it is advisable to remove hiss gradually. For example remove 20DB of hiss level first then run the recording through the noise reduction plug-in for a second time and remove another 10 or 20DB, removing too much hiss at any one time can cause your recording to sound "expanded". When making a recording, ensure you have say half a second of tape hiss or whatever background noise you're trying to remove at the beginning of the recording, that way you can capture a noise print "on- the-fly" without having to select a portion of your file as described in the first few steps of this message, I realise of course that this cannot always be done. Hope this helps.
On 05/03/2008, at 12:37 AM, hank smith wrote: > how do you use this perticular feature when sampling noise print or > is this > where sighted assistance is needed? > thanks > Hank ****************************** Dane Trethowan From Melton Victoria Australia Phone +613 9747 3975 Voiceover Tech Support +613 8732 9237 Fax +613 9743 7954 mailto:[EMAIL PROTECTED] msn: [EMAIL PROTECTED] skype: callto:grtdane12 ******************************* Audio List Help, Guidelines, Archives and more... http://www.pc-audio.org To unsubscribe from this list, send a blank email to: [EMAIL PROTECTED]
