r. For example to multiply the incoming signal by <code>0.1</code>, we wrote <code>_,0.1:*</code>. For numerical expressions this notation is not always the most convenient and sometimes we would prefer to use the more traditional infix notation and write instead <code>_*0.1</code>. We can also use the prefixed notation and write <code>*(0.1)</code>. </p>
<p>Let's rewrite the definition of the <code>monoamp</code> using the prefix notation:</p>
<!-- faust-run -->
<div class="faust-run"><img src="exfaust10/e