deletions | additions       diff --git a/music2.tex b/music2.tex  index 34556ae..ac4eda1 100644  --- a/music2.tex  +++ b/music2.tex 
...
\end{figure}  These Sharps and flats  are referred to as accidentals. Each additional $\#$ $(\#)$  increases the pitch to which the note name refers by 1 semitone; likewise, each $b$ $(b)$  decreases the pitch by 1 semitone. The black keys on the piano represent pitches 1 semitone in between the surrounding white keys. Each white key is either 1 semitone or 2 semitones apart, depending on if a black key is in the middle. For instance, $C$ and $D$ are 2 semitones apart, whereas $E$ and $F$ are 1 semitone apart. See figure ~\ref{fig:piano}.