ASK TRASMISSION

Good Morning all of you ... and good 2012 ...
Does anybody know how to trasmitt and receive data with arduino using "ASK TRANSMISSION" at 600 or 1200 baud data rate ?

Thanks and Ciao,
gnux

There is one library: http://www.open.com.au/mikem/arduino/VirtualWire.pdf

Is there anyway to do this in other audio TX? I would like to do a APRS modem in RC airplane, using a audio channel to trasmit GPS information via ASK modulation, this is possible?

look possible, just need some electronics skills to determine the best frequency and to build the modulator and demodulator