class="src src-lisp"><span class="prompt">SCRATCH&gt;</span> (<span style="color: #8deeee;">defparameter</span> <span style="color: #eedd82;">env1</span> (make-envelope '(0 1 0) '(.2 .8)))</pre>

      <p>
        The first argument of <code>MAKE-ENVELOPE</code> is a list of levels
        and the second argument is a list of times in seconds to specify the
        durations of the segments. For example, the break-point pairs of the
        envelope <code>ENV1</code> are:
      </p>

      <table>
        <