No problem, glad you were able to get it to work. On Thu, Nov 15, 2012 at 7:26 PM, Richard C. Steffens <[email protected]>wrote:
> > > On Thu, 15 Nov 2012 12:03:31 -0800 > > "Richard C. Steffens" <[email protected]> wrote: > > > > Anyway, does anyone have any ideas about why the sound on my Linux > > machines show this noise while the sound on two Winders machines does > > not? And more important, is there anything I can do about it, other > > than listening on XP while typing on Ubuntu? > > > <...> > On 11/15/2012 04:23 PM, Dale Snell wrote: > > Hard to say what this might be. The only thing I can think of off > > the top of my head is that you've got clipping somewhere. Try > > loading one of the errant files into Audacity and check for > > clipping. If it's there, use Audacity reduce the audio amplitude; > > that should clear up the problem. > > Bingo. I had to check the box, "Show Clipping" in the View menu, and it > was obvious. Clipping was present every time one of the speakers spoke. > I used the amplify effect to reduce the amplitude from 0.0 to -1.4 and > the clipping disappeared. However, while quieter, the noise was still > present in the saved mp3 file. > > On 11/15/2012 06:40 PM, King Beowulf wrote: > > > Rich, what linux audio player are you using? > > I'm using a program called a python program called Transcribe. I get the > same noise when using Movie Player. I'm guessing it uses the same > underlying sound library as Transcribe, which uses gstreamer. > Interestingly, though, the noise is not present when I play the audio > with Audacity. > > > You said you "clean up" the > > mp3 in audacity so is the sound quality bad in audacity or just another > > player? > > I gave a wrong impression. I did not use Audacity to "clean up" this > particular mp3. I have used Audacity for that purpose in the past, but > not this time. It didn't occur to me to try since the noise sounds like > an effect I get sometimes when filtering with Audacity. > > > As Dale mentioned, clipping could be a reason. Also, if you > > didn't set up the noise filter properly you can have introduced some > > static that depends on the mp3 codec and player (Fraunhofer licensed vs. > > LAME for example). > > LAME is what's installed here -- at least for exporting mp3s from Audacity. > > > Also, you may wish to convert to a lossless format > > (wav or flac) before editing in audacity. Also, consider mp3 bit rate, > > CBR vs VBR.... > > This proved very useful. I imported the mp3 into Audacity at the > beginning of this exercise (responding to these e-mails). Since it was > already there, I exported the file as flac -- after the amplitude > reduction. Now it plays nice and quiet in Transcribe and Movie Player. > > Thanks to both of you for your helpful ideas. > > -- > Regards, > > Dick Steffens > > _______________________________________________ > PLUG mailing list > [email protected] > http://lists.pdxlinux.org/mailman/listinfo/plug > -- Free Geek Seattle- Helping The Needy Get Nerdy http://www.freegeekseattle.org/ https://groups.google.com/group/freegeek-seattle/topics?hl=en K Desktop Environment- Experience Freedom & User Friendliness http://kde.org/ Free Lossless Audio Codec https://secure.wikimedia.org/wikipedia/en/wiki/Flac Protect your digital freedom and privacy, eliminate DRM, learn more at http://www.defectivebydesign.org/what_is_drm _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
