#!/bin/bash
#
# Piano is an easy to understand music program
# That directly shows its relation to keyboard input and audio output
# This offers a clear demonstration of while loops and case operations
#	'if a key is this key, then the note is this note'
#

#ON START
echo "
		PIANO
 _______________________________________  
|  | | | |  |  | | | | | |  |  | | | |  | 
|  | | | |  |  | | | | | |  |  | | | |  | 
|  | | | |  |  | | | | | |  |  | | | |  | 
|  |_| |_|  |  |_| |_| |_|  |  |_| |_|  | 
|   |   |   |   |   |   |   |   |   |   | 
| C | D | E | F | G | A | B | C | D | E | 
|___|___|___|___|___|___|___|___|___|___| 

	   Press Keys to Play
"
echo "Welcome to the Piano. Press any keys to play a song"|festival --tts &> /dev/null&

while true
do
	read -n 1 key
	case $key in

		#Top Row		
		1)	note=A5;;
		2)	note=B5;;
		3)	note=C6;;
		4)	note=D6;;
		5)	note=E6;;
		6)	note=F6;;
		7)	note=G6;;
		8)	note=A6;;
		9)	note=B6;;
		0)	note=C7;;
		-)	note=D7;;
		=)	note=E7;;

		#Middle Top Row
		q)	note=C4;;
		w)	note=D4;;
		e)	note=E4;;
		r)	note=F4;;
		t)	note=G4;;
		y)	note=A4;;
		u)	note=B4;;
		i)	note=C5;;
		o)	note=D5;;
		p)	note=E5;;
		"[")	note=F5;;
		"]")	note=G5;;

		#Middle Bottom Row
		a)	note=F2;;
		s)	note=G2;;
		d)	note=A2;;
		f)	note=B2;;
		g)	note=C3;;
		h)	note=D3;;
		j)	note=E3;;
		k)	note=F3;;
		l)	note=G3;;
		";")	note=A3;;
		"'")	note=B3;;

		#Bottom Row
		z)	note=C1;;
		x)	note=D1;;
		c)	note=E1;;
		v)	note=F1;;
		b)	note=G1;;
		n)	note=A1;;
		m)	note=B1;;
		",")	note=C2;;
		".")	note=D2;;
		"/")	note=E2;;
	
		#OTHER
	
		$'\e') 
			echo "Good Bye"|festival --tts &> /dev/null&
			exit ;;	
		*)
			note=C3;
	esac

	echo "	NOTE:" $note
	play -qn synth 2 pluck $note &>/dev/null&
done