/em> represent operations on audio signals, whereas composition operations are used to link two audio operations together. In other words, you can write <code>+</code> or <code>*</code> alone, because they represent valid audio operations, but you can never write <code>,</code> or <code>:</code> alone because they are used to connect two audio operations. You must always write <code>A,B</code> or <code>A:B</code>.</p>
<p>The primitives of Faust are organized in several categories. We find all the numerical 