Backing Tracks from Vanilla Book

http://www.ralphpatt.com/Backing.html

Square Sound!

http://www.squaresound.com

Wolf Skull Ref

http://www.flickr.com/photos/baggis/281777242/in/photostream/

Explosion Reference

http://vimeo.com/20313526

Frequency Detector

http://www.ee.nmt.edu/~thomas/data_sheets/NE_SE567.pdf

http://lab.guilhermemartins.net/2009/05/03/sound-sensor/ 

http://bochovj.wordpress.com/2013/06/23/sound-analysis-in-arduino

Music Theory

http://www.musictheory.net

http://www.greatcourses.co.uk/ttcx/coursedesclong2.aspx?cid=7261

The Daily Grind

http://www-cs.canisius.edu/~bucheger/SaxPages1.html

SX90

http://www.sax.co.uk/acatalog/info_1641.html

Iori Yagami Sprite Sheet

http://spriters-resource.com/arcade/snkvcapchaos/iori.png

Never satisfied with what I have

http://www.lougheed.com/LC/messages/682.html

Filtering Accelerometer Data

http://www.rcgroups.com/forums/showthread.php?t=1017838

http://www-users.cs.york.ac.uk/~fisher/mkfilter/trad.html

http://www.atmel.com/dyn/resources/prod_documents/doc2527.pdf

FFT for arduino:
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1286718155

DSP Guide

http://www.dspguide.com/

Arduino Tilt Sensor

http://didier.longueville.free.fr/arduinoos/?p=1389

http://forum.unity3d.com/threads/39142-iPhoneInput-acceleration-correction

Sonic Sheet Music

http://www.gamemusicthemes.com/megadrivesheetmusic.html
http://www.vgmusic.com/

http://www.finalfantasymusicscores.com

http://www.finalfantasymusicscores.com

Four Horsemen of Relationship Apocalypse

http://www.relationshipresourcecenter.com/html/fourhorse.html

http://www.marleneandbob.com/articles.htm