http://distrowatch.com/weekly.php?issue=20100621#news
Per chi, come me, trova assolutamente irritante il frastuono delle vuvuzela, mentre si cerca di guardare un incontro in tranquillità, si è mosso anche il mondo del software, per cercare di ridurre o eliminare del tutto tale disturbo dall'audio delle partite di calcio del Mondiale 2010.0, viste ed ascoltate attraverso il PC.Finally, somewhat off-topic, but sometimes it can't hurt to add an amusing twist to the serious world of free software. During the last couple of weeks the infamous vuvuzela, obnoxiously accompanying every single match at the ongoing football world cup in South Africa, has become a source of irritation to many football fans around the world. The sound of the tuneless horn is reportedly not so bad when absorbing it in a stadium, but it tends to spoil the experience for those who watch the spectacle on TV. If you are among those who can't stand the racket but enjoy watching sporting events on a computer, a number of solutions exists to help you keep sane during the matches. Fedora users can filter the unpleasant sound by following this simple guide, while Ubuntu fans could use a VLC plugin called VuvuzeLAUTLOS. There is also a devuvuzelator for Mac OS X users. But perhaps the most elegant solution has been provided by André Dieb who suggests an excellent one-liner (for GStreamer on Debian-based distributions to filter out the unpleasant sound frequencies. The code looks like this:
gst-launch-0.10 autoaudiosrc ! audioconvert ! audiochebband mode=band-reject lower-frequency=223 upper-frequency=243 type=2 ripple=50 ! audiochebband mode=band-reject lower-frequency=456 upper-frequency=476 type=2 ripple=50 ! audiochebband mode=band-reject lower-frequency=922 upper-frequency=942 type=2 ripple=50 ! audiochebband mode=band-reject lower-frequency=1854 upper-frequency=1874 type=2 ripple=50 ! audioconvert ! autoaudiosink
We haven't tried this solution so use at your own risk! Now, does anybody have a solution to filter out the poor performances of some of the star-studded teams that play at the tournament?
E così vengono proposte diverse soluzioni, consistenti in vari filtri e plugin, che potrete provare.