I am new to PicBASIC, and im not too sure how to work this out right now, but i would liek to make a TTY Terminal. TTY is used by deaf people to place calls through a relay operator. TTY Terminals work by using the BAUDOT protocol. There is a set of tones that has to be decoded and turned into characters on an LCD display. Im sure i can figure out how to generate the tones, and place them on an LCD display, but how can i decode Multi-Frequency tones? Any ideas?