playing differnt audio based on received RF waves

hi... im doing a project on traffic sign recognition where diff numbers are assigned to diff traffic signs and these are transmitted using radio waves... so based on the received signal im trying give audio alert but im not getting how to play different audios in arduino... please help me..

Most beginners go for the TMRpcm libiary. You can store short samples inside the Arduino's memory, about 3 seconds worth. Otherwise you have to use an SD card.

This is a simple yes / no sample to give you an idea of the quality you can get. Arduino Uno saying Yes & No without extra hardware - YouTube

It might be simpler to get one of these Adafruit Wave Shield for Arduino Kit [v1.1] : ID 94 : $22.00 : Adafruit Industries, Unique & fun DIY electronics and kits

As to your project I have no idea what it is about, the explanation was not too clear.