 <dt>Slide [s]</dt>
  <dd>
  <p>Pitch slide time.</p>
  </dd>
  <dt>Slide Type</dt>
  <dd>
  <p>3 types of pitch slide are available.</p>
  <ul>
  <li><code>Always</code> : Always slide from the pitch of last
  note.</li>
  <li><code>Sustain</code> : Only slide when 2 or more keys are
  pressed.</li>
  <li><code>Reset to 0</code> : When number of pressed key is changed
  from 0 to 1, or 1 to 0, pitch will be slide to 0 Hz. Otherwise, slide
  behaves same as other 2 options. On release, slide time follows th