to scale the envelope levels.
        For example:
      </p>

      <pre class="src src-lisp">(<span style="color: #8deeee;">dsp!</span> <span style="color: #87cefa;">env-test-4</span> ((env envelope) gate amp dur)
  (stereo (sine (envelope env gate dur #'identity) amp 0)))

(<span style="color: #8deeee;">defun</span> <span style="color: #87cefa;">retrig-test</span> ()
  (rt-eval ()
    (<span style="color: #8deeee;">let</span> ((time (now)))
      (at time #'set-control 1 <span style="color: #b0c4de;">:ga