Add subcommands for basic sound control

bin/eeiam.in

     echo at
     echo back
     echo bbl
+    echo deaf
+    echo deafnomore
     echo gone
+    echo listening
     echo moving
     echo ooo
     echo wfh
     iniread -p iam.saying.like.this.$what | bash
 }
 
+sound_is_muted() {
+    #
+    # At least one playback channel is muted
+    #
+    local master_status="$(amixer get Master)"
+    echo "$master_status" \
+      | grep "Playback channels" \
+      | sed -e 's/.*: //; s/ - /\n/' \
+      | while read chname
+        do
+            grep -e "^ *$chname" <<<"$master_status"
+        done \
+      | grep -qse '\[off\]$'
+}
+
 
 #
 # subcommand handlers
     setxkbmap "$nxt"
 }
 
+i_am_deaf() {
+    amixer -q sset Master 5%+
+}
+
+i_am_deafnomore() {
+    amixer -q sset Master 5%-
+}
+
 i_am_gone() {
     #
     # gone fishin'
     i_am_back
 }
 
+i_am_listening() {
+    if sound_is_muted;
+    then
+        amixer -q sset Master unmute;
+    else
+        amixer -q sset Master mute;
+    fi
+}
+
 i_am_moving() {
     #
     # to other train or dreamland, but localhost must sleep now