Added sing.sh so I can use notes instead of frequencies for beep(1)

.bashrc.d/sing.sh

@@ -0,0 +1,166 @@
+note2freq(){
+	local freq
+	case $1 in 
+		A[1-7])
+			case $1 in 
+				*1) freq=55;;
+				*2) freq=110;;
+				*3) freq=220;;
+				*4) freq=440;;
+				*5) freq=880;;
+				*6) freq=1760;;
+				*7) freq=3520;;
+			esac
+			;;
+		Bb[1-7]|As[1-7])
+			case $1 in 
+				*1) freq=58;;
+				*2) freq=117;;
+				*3) freq=233;;
+				*4) freq=466;;
+				*5) freq=932;;
+				*6) freq=1865;;
+				*7) freq=3729;;
+			esac
+			;;
+		B[1-7])
+			case $1 in 
+				*1) freq=62;;
+				*2) freq=124;;
+				*3) freq=247;;
+				*4) freq=494;;
+				*5) freq=988;;
+				*6) freq=1976;;
+				*7) freq=3951;;
+			esac
+			;;
+		C[1-7])
+			case $1 in 
+				*1) freq=33;;
+				*2) freq=65;;
+				*3) freq=131;;
+				*4) freq=262;;
+				*5) freq=523;;
+				*6) freq=1047;;
+				*7) freq=2093;;
+			esac
+			;;
+		Cs[1-7]|Db[1-7])
+			case $1 in 
+				*1) freq=35;;
+				*2) freq=69;;
+				*3) freq=139;;
+				*4) freq=277;;
+				*5) freq=554;;
+				*6) freq=1109;;
+				*7) freq=2217;;
+			esac
+			;;
+		D[1-7])
+			case $1 in 
+				*1) freq=37;;
+				*2) freq=73;;
+				*3) freq=147;;
+				*4) freq=294;;
+				*5) freq=587;;
+				*6) freq=1175;;
+				*7) freq=2349;;
+			esac
+			;;
+		Ds[1-7]|Eb[1-7])
+			case $1 in 
+				*1) freq=39;;
+				*2) freq=73;;
+				*3) freq=147;;
+				*4) freq=294;;
+				*5) freq=587;;
+				*6) freq=1175;;
+				*7) freq=2349;;
+			esac
+			;;
+		E[1-7])
+			case $1 in 
+				*1) freq=41;;
+				*2) freq=82;;
+				*3) freq=165;;
+				*4) freq=330;;
+				*5) freq=659;;
+				*6) freq=1319;;
+				*7) freq=2637;;
+			esac
+			;;
+		F[1-7])
+			case $1 in 
+				*1) freq=44;;
+				*2) freq=87;;
+				*3) freq=175;;
+				*4) freq=349;;
+				*5) freq=699;;
+				*6) freq=1397;;
+				*7) freq=2794;;
+			esac
+			;;
+		Fs[1-7]|Gb[1-7])
+			case $1 in 
+				*1) freq=46;;
+				*2) freq=93;;
+				*3) freq=185;;
+				*4) freq=370;;
+				*5) freq=740;;
+				*6) freq=1480;;
+				*7) freq=2960;;
+			esac
+			;;
+		G[1-7])
+			case $1 in 
+				*1) freq=49;;
+				*2) freq=98;;
+				*3) freq=196;;
+				*4) freq=392;;
+				*5) freq=784;;
+				*6) freq=1568;;
+				*7) freq=3136;;
+			esac
+			;;
+		Gs[1-7]|Ab[1-7])
+			case $1 in 
+				*1) freq=52;;
+				*2) freq=104;;
+				*3) freq=208;;
+				*4) freq=415;;
+				*5) freq=831;;
+				*6) freq=1661;;
+				*7) freq=3322;;
+			esac
+			;;
+		*)
+			printf "ERROR: Unknown note: \"%s\"
+Valid note syntax: <letter>[accidental]<octave>
+
+Valid values:
+	<letter>	\"A\" through \"G\"
+	[accidental]	\"b\" (flat), or \"s\" (sharp)
+			Exceptions: \"Bs\", \"Cb\", \"Es\", and \"Fb\" are not valid.
+	<octave>	\"1\" through \"7\"
+" "$1"
+			return
+	esac
+	printf "%s" "$freq"
+}
+
+sing() {
+	local beepstring
+	while [ "${3+defined}" ]; do
+		if [ "$3" = "-n" ]; then
+			beepstring="$beepstring -f $(note2freq $1) -l $2 -n"
+			shift 3
+		else
+			echo "Error"
+			return
+		fi
+	done
+	if [ -z "$3" ]; then
+		beepstring="$beepstring -f $(note2freq $1) -l $2"
+		beep $beepstring
+	fi
+}