n class="keyword">let</span> makeWithInterval: MusicTheory.Model.Interval.t <span>=&gt;</span> option(<a href="#type-t">t</a>);</code></dt><dt class="spec value" id="val-interval"><a href="#val-interval" class="anchor"></a><code><span class="keyword">let</span> interval: <a href="#type-t">t</a> <span>=&gt;</span> MusicTheory.Model.Interval.t;</code></dt><dt class="spec value" id="val-notation"><a href="#val-notation" class="anchor"></a><code><span class="keyword">let</span> notation: <a href="#type-t">t</a>