An example time signature. The music is the opening of Ludwig van Beethoven's Piano Sonata No. 31.
Image generated from the following LilyPond file:

\version "2.8.0"
\layout { ragged-right = ##t }
\new PianoStaff &lt;&lt;
        \new Staff {
                \time 3/4
                \clef treble
                \key aes \major
                &lt; c'' aes' &gt; 4. &lt; aes' ees' &gt; 8 &lt; aes' ees' &gt; 8.[ &lt; aes' ees' &gt; 16]
                &lt; des'' g' &gt; 4 &lt; bes' g' &gt; 2
        }
        \new Staff {
                \clef bass
                \key aes \major
                &lt; ees aes, &gt; 4. &lt; ees c &gt; 8 &lt; ees c &gt; 8.[ &lt; ees c &gt; 16]
                &lt; ees bes, &gt; 4 &lt; ees des &gt; 2
        }
&gt;&gt;
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