problems after noise removal

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seshu093
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Joined: Fri May 17, 2013 1:26 pm
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problems after noise removal

Post by seshu093 » Fri May 17, 2013 1:36 pm

i used the noise removal feature and it was very superb

i was able to play the song in my pc without noise (after removal)

but when i play the same audio file in other pc's and laptops

the noise is very much there and is not at all removed

please help me out

steve
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Joined: Sat Dec 01, 2007 11:43 am
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Re: problems after noise removal

Post by steve » Fri May 17, 2013 1:52 pm

Please post a couple of short samples - a few seconds of a recording before Noise Removal and the same few seconds after Noise Removal. Ensure that the audio sample includes some normal level audio as well as some "silence".
See here for how to post an audio sample: http://forum.audacityteam.org/viewtopic ... 49&t=64936
9/10 questions are answered in the FREQUENTLY ASKED QUESTIONS (FAQ)

seshu093
Posts: 10
Joined: Fri May 17, 2013 1:26 pm
Operating System: Please select

Re: problems after noise removal

Post by seshu093 » Sat May 18, 2013 7:20 am

here is the samples

only in my pc i am able to get noiseless audio
in all others there is no noise removed at all
Attachments
after noise removal.mp3
(236.56 KiB) Downloaded 282 times
before noise removal.mp3
(235.13 KiB) Downloaded 300 times

seshu093
Posts: 10
Joined: Fri May 17, 2013 1:26 pm
Operating System: Please select

Re: problems after noise removal

Post by seshu093 » Sat May 18, 2013 7:21 am

here are the project file samples
Attachments
after noise removal.aup
(1.95 KiB) Downloaded 37 times
before noise removal.aup
(1.95 KiB) Downloaded 61 times

steve
Site Admin
Posts: 81653
Joined: Sat Dec 01, 2007 11:43 am
Operating System: Linux *buntu

Re: problems after noise removal

Post by steve » Sat May 18, 2013 9:27 am

The project files don't help - an AUP file cannot be played without the audio data folder (http://manual.audacityteam.org/o/man/au ... s.html#AUP)

The MP3s are in a low quality format that will significantly reduce the sound quality. Also I suspect that you are performing the audio processing in a less than optimal quality format. For best quality work in 44100 Hz 32 bit float format (48000 for DVD video). Sample rates lower than this will tend to sound muffled and lower bit formats will add background hiss. See here about default settings: http://manual.audacityteam.org/o/man/qu ... ences.html

Note that importing some types of audio file will override these default settings - ideally you should work in an uncompressed format (such as WAV) throughout the process so as to preserve the best sound quality.

The audio data format is displayed in the panel on the left end of the audio track: (see "Track Information" http://manual.audacityteam.org/o/man/au ... .html#info) Ensure that this says "32 bit float" - if not, change it to 32 bit float before you work on the track ("Track drop down menu" http://manual.audacityteam.org/o/man/tr ... _menu.html)

(You did well with the Noise Removal effect :))
9/10 questions are answered in the FREQUENTLY ASKED QUESTIONS (FAQ)

seshu093
Posts: 10
Joined: Fri May 17, 2013 1:26 pm
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Re: problems after noise removal

Post by seshu093 » Sat May 18, 2013 4:34 pm

i have the same settings as u said

but i guess the problem i had ll be that i compressed the songs as the files created using audacity were too large

after compression the sample rate went to 21000 hz

seshu093
Posts: 10
Joined: Fri May 17, 2013 1:26 pm
Operating System: Please select

Re: problems after noise removal

Post by seshu093 » Sat May 18, 2013 4:36 pm

but even if i compress
y is it that only in my pc it is good
not in anybody else's PC :oops:

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