) Stdlib.result Lwt.t</code></dt><dd><p>Get a list based on some filer. For example &quot;list album artist &quot;Elvis Presley&quot;&quot; will return a list of the album names of Elvis Presley that exists in the music database.</p></dd></dl><dl><dt class="spec value" id="val-update"><a href="#val-update" class="anchor"></a><code><span class="keyword">val </span>update : <a href="../Mpd/Client_lwt/index.html#type-t">Mpd.Client_lwt.t</a> <span>&#45;&gt;</span> string option <span>&#45;&gt;</span> <a href=".