COMMUNITY : FORUMS : SQUARE PEGS

I want some sort electronic device to control sound. example: i download a few sound clips upload the in to the device then i can play it with the device. I know such device exist all ready(MIDI) but I'm not the most wealthy person (I'm a low budget kid of guy). And I'm looking to make it instead of buying it. My main concern is the storing and programing the sound to a button.