Morse Code to Audio Encoder with Complete Control (this is outdated; please visit here for a more efficient library)
tested with arduino uno rev 3 use serial com to change the parameters at the startup so use serial monitor! use international standards for morse encoding and 55 characters are encodable!
Supported characters - ABCDEFGHIJKLMNOPQRSTUVWXYZ 0123456789.:,;?=/!-_"()$@&+