Dear G+ users,

I am trying to make some music with Perl following http://blog.und3f.com/joy-of-the-internal-speaker but it seems that /usr/bin/beep does not make any sound on my system.

Even if I run it as sudo /usr/bin/beep

Any idea why and how to fix it? (this is an Ubuntu 12.4 and other software can make sounds)
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