Update

README.md

-#Guitar and Bass Tuner for Teensy 3.1
+#Guitar and Bass Tuner for Teensy 3.1 v2.0
 
-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.
+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
+_______________                     _________
+|GND  |   |  Vin|                   |       |
+|0     ---  AGND|                   |       |
+|1          3.3V|                   |       |
+|2            23|                   |       |
+|3            22|                   |       |
+|4            21|                   |_______|
+|5            20|                     |':`|
+|6            19|                     |':`|
+|7            18|                     |':`|
+|8            17|                     |':`|
+|9         A2/16|                     |':`|
+|10           15|                     |':`|
+|11           14|                     |':`|
+|12           13|                     |===|
+ ---------------                      |___|
+                                       \ /
+                                       / \
+                                      -----
+                                      \   /
+                                       \_/