Save that code in a file called moc and put it somewhere in your $PATH

moc

#!/bin/bash

# /!\ WARNING /!\
# ---------------
# DO NOT PUT THE CONTENTS OF THIS SCRIPT INTO
# A FUNCTION OR ELSE MOC WILL STOP RUNNING AS
# SOON AS YOU CLOSE THE TERMINAL WINDOW IN WHICH
# IT WAS FIRST LAUNCHED!!

number=$(ps aux | grep jackd | grep -v grep | wc -l)

# if jackd is not running, launch it because moc needs it.
# the -T option makes sure that jack quits when mocp quits
# so that it doesn't eat up cpu for nothing
if [[ ! $number -gt 0 ]]
then
	jackd -T -d coreaudio &> /dev/null &
fi

mocp