 returned, and similarly
for <code>"a2"</code> and <code>"a3"</code>. The results can be in <code><a href="https://rdrr.io/r/base/raw.html" class="external-link">raw()</a></code> or numeric form,
as illustrated in the “Examples”.</p></li>
<li><p>If <code>i</code> is <code>"q1"</code> then signal quality is returned, and similarly
for <code>"q2"</code> and <code>"q3"</code>.  As with amplitude, the result can be in <code><a href="https://rdrr.io/r/base/raw.html" class="external-link">raw()</a></code>
or 