How to use a raspbian pi to send commands to 3 different Arduinos

I am trying to figure out how to use one Raspberry Pi with a voice command to automatically send a certain program to a certain Arduino based on what i told to voice command. This is for my robot I am designing. It will have 3 Arduinos and on Raspberry Pi. Each Arduino controls a different part of the robot.

Hello @carter.s.whitfield
You will have more chances of getting an answer if you post on the official Raspberry Pi forums.