update

README.md

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 Software algorithm ([YIN]) for guitar and bass tuning using a Teensy Audio Library. This audio object's algorithm is somewhat memory and processor hungry but will allow you to detect lower frequencies than the Audio library's Goertzel algorithm will.
 
 [YIN]:http://recherche.ircam.fr/equipes/pcm/cheveign/pss/2002_JASA_YIN.pdf
+<pre>
 _______________                     _________
 |GND  |   |  Vin|                   |       |
 |0     ---  AGND|                   |       |
@@ -23,4 +24,5 @@ _______________                     _________
                                        / \
                                       -----
                                       \   /
-                                       \_/
+                                       \_/
+<pre>