Add volume control and more announcement templates.

bin/announce-freeform

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+source pa-lib
+
+pa-preheat
+
+pa-announcement
+
+pa-say "$@"
+
+pa-announcement-quick
+
+pa-shutdown
+

bin/announce-midnight

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+source pa-lib
+
+pa-preheat
+
+pa-volume-quiet
+pa-announcement
+
+pa-say "It is midnight."
+
+pa-announcement-quick
+
+pa-shutdown
+

bin/emergency-freeform

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+source pa-lib
+
+pa-preheat
+
+pa-volume-loud
+pa-announcement-quickest
+
+emergency-light on
+
+sleep 1
+
+pa-say "$@"
+
+sleep 1
+
+emergency-light off
+
+pa-announcement-quick
+
+pa-shutdown
+

bin/emergency-test

@@ -6,11 +6,13 @@ pa-preheat
 
 pa-announcement-quickest
 
+pa-volume-normal
 pa-say "Test of emergency warning system will begin."
 
 sleep 1
 
 emergency-light	on
+pa-volume-loud
 pa-say "This is only a test. In the event of an emergency, this emergency warning light would be used to declare an emergency."
 pa-say "This is only a test."
 
@@ -18,6 +20,7 @@ sleep 1
 
 emergency-light off
 
+pa-volume-normal
 pa-say "This was a test of the emergency warning light system. Thank you for your cooperation."
 
 pa-announcement-quick

bin/pa-lib

@@ -15,9 +15,26 @@ function play() {
 	$PLAYER $@ > /dev/null 2>&1
 }
 
+function pa-volume() {
+	amixer cset numid=3,iface=MIXER,name='Line Out Playback Volume' $1 > /dev/null
+}
+
+function pa-volume-normal() {
+	pa-volume 15
+}
+
+function pa-volume-loud() {
+	pa-volume 25
+}
+
+function pa-volume-quiet() {
+	pa-volume 8
+}
+
 function pa-preheat() {
 	info "PA Preheating"
 	pa-power off
+	pa-volume-normal
 	play $SOUNDS/announcement_4-tone_up_quickest.ogg
 	pa-power on
 	info "PA Ready"
@@ -26,6 +43,7 @@ function pa-preheat() {
 function pa-shutdown() {
 	info "PA Shutdown"
 	pa-power off
+	pa-volume-normal
 }
 
 function pa-announcement() {