wo. The largest delay you'll fit in an atmega328 will be 512 cells, which at 16384 Hz sample rate is 31 milliseconds. More of a flanger or a doubler than an echo. The amount of memory available for delays on other chips will vary. <a class="el" href="class_audio_delay.html#a688f69088f96bf3976a8555d3026365f" title="Constructor. ">AudioDelay()</a> doesn't have feedback. If you want feedback, use <a class="el" href="class_audio_delay_feedback.html" title="Audio delay line with feedback for comb filter, flange,