# Align text in enumerate environment

From the code below, I wanted to be able to align the text in the enumerate environment like this:

Here is the code that I have so far:

\documentclass{book}
\usepackage{enumitem}

\begin{document}
\begin{enumerate}
\item Pre-Emphasis - increase amplitude of higher modulating frequencies.
\item De-Emphasis - attenuate those frequencies by the amount that were boosted by the pre-emphasis.
\end{enumerate}
\end{document}

• Do you want to align all second lines of the enumerate environment at the same point? – Bernard Mar 10 '16 at 22:21
• @Bernard, Hello. Yes, I would like to align all second lines of the enumerate environment. Thanks. – Joe Mar 10 '16 at 22:22
• Consider the beginning of your two items do not have the same length. – Bernard Mar 10 '16 at 22:34

You may be better served with a tabularx environment.

\documentclass{book}
\usepackage{tabularx}
\begin{document}
\noindent
\begin{tabularx}{\textwidth}{@{}l@{ }l@{ -- }X@{}}
1. &  Pre-Emphasis & increase amplitude of higher modulating frequencies\\[1ex]
2. &  De-Emphasis  & attenuate those frequencies by the amount
that were boosted by the pre-emphasis
\end{tabularx}
\end{document}