diff --git a/ChangeLog b/ChangeLog
index 6d0597dd..b7386074 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -17048,3 +17048,11 @@
 2018-06-12 Fred Gleason <fredg@paravelsystems.com>
 	* Changed the name of the 'Initial Audio Ports' control to
 	'Active Audio Ports' in the 'Configure JACK' dialog in rdadmin(1).
+2018-06-12 Fred Gleason <fredg@paravelsystems.com>
+	* Added a 'card-num' parameter to the 'Meter Enable' ['ME'] command
+	in caed(8).
+	* Added an 'RDCae::enableMetering()' method.
+	* Modified rdairplay(1) to enable metering explicitly.
+	* Modified rdcartslots(1) to enable metering explicitly.
+	* Modified rdlibrary(1) to enable metering explicitly.
+	* Modified rdpanel(1) to enable metering explicitly.
diff --git a/cae/cae.cpp b/cae/cae.cpp
index 10847c78..4c3d7716 100644
--- a/cae/cae.cpp
+++ b/cae/cae.cpp
@@ -171,6 +171,9 @@ MainObject::MainObject(QObject *parent,const char *name)
     argnum[i]=0;
     argptr[i]=0;
     auth[i]=false;
+    for(int j=0;j<RD_MAX_CARDS;j++) {
+      update_meters[j][i]=false;
+    }
   }
   for(int i=0;i<RD_MAX_CARDS;i++) {
     cae_driver[i]=RDStation::None;
@@ -1808,6 +1811,15 @@ void MainObject::DispatchCommand(int ch)
       return;
     }
     meter_port[ch]=port;
+    for(int i=2;i<argnum[ch];i++) {
+      sscanf(args[ch][i],"%d",&card);
+      if((card<0)||(card>=RD_MAX_CARDS)) {
+	EchoArgs(ch,'-');
+	return;
+      }
+      update_meters[card][ch]=true;
+    }
+
     EchoArgs(ch,'+');
     SendMeterOutputStatusUpdate();
     return;
@@ -1885,6 +1897,7 @@ void MainObject::KillSocket(int ch)
   auth[ch]=false;
   meter_port[ch]=0;
   for(int i=0;i<RD_MAX_CARDS;i++) {
+    update_meters[i][ch]=false;
     for(int j=0;j<RD_MAX_STREAMS;j++) {
       if(record_owner[i][j]==ch) {
 	unsigned len=0;
@@ -2307,30 +2320,35 @@ void MainObject::FreeMadDecoder(int card,int stream)
 void MainObject::SendMeterLevelUpdate(const QString &type,int cardnum,
 				      int portnum,short levels[])
 {
-  char msg[1500];
-  int n=snprintf(msg,1500,"ML %s %d %d %d %d",
-		 (const char *)type,cardnum,portnum,levels[0],levels[1]);
-  SendMeterUpdate(msg,n);
+  for(int l=0;l<CAE_MAX_CONNECTIONS;l++) {
+    if((meter_port[l]>0)&&update_meters[cardnum][l]) {
+      SendMeterUpdate(QString().sprintf("ML %s %d %d %d %d",
+	       (const char *)type,cardnum,portnum,levels[0],levels[1]),l);
+    }
+  }
 }
 
 
 void MainObject::SendStreamMeterLevelUpdate(int cardnum,int streamnum,
 					    short levels[])
 {
-  char msg[1500];
-  int n=snprintf(msg,1500,"MO %d %d %d %d",
-		 cardnum,streamnum,levels[0],levels[1]);
-  SendMeterUpdate(msg,n);
+  for(int l=0;l<CAE_MAX_CONNECTIONS;l++) {
+    if((meter_port[l]>0)&&update_meters[cardnum][l]) {
+      SendMeterUpdate(QString().sprintf("MO %d %d %d %d",
+		  cardnum,streamnum,levels[0],levels[1]),l);
+    }
+  }
 }
 
 
 void MainObject::SendMeterPositionUpdate(int cardnum,unsigned pos[])
 {
-  char msg[1500];
-  int n;
-  for(unsigned i=0;i<RD_MAX_STREAMS;i++) {
-    n=snprintf(msg,1500,"MP %d %d %d",cardnum,i,pos[i]);
-    SendMeterUpdate(msg,n);
+  for(unsigned k=0;k<RD_MAX_STREAMS;k++) {
+    for(int l=0;l<CAE_MAX_CONNECTIONS;l++) {
+      if((meter_port[l]>0)&&update_meters[cardnum][l]) {
+	SendMeterUpdate(QString().sprintf("MP %d %d %d",cardnum,k,pos[k]),l);
+      }
+    }
   }
 }
 
@@ -2341,7 +2359,12 @@ void MainObject::SendMeterOutputStatusUpdate()
     if(cae_driver[i]!=RDStation::None) {
       for(unsigned j=0;j<RD_MAX_PORTS;j++) {
 	for(unsigned k=0;k<RD_MAX_STREAMS;k++) {
-	  SendMeterOutputStatusUpdate(i,j,k);
+	  for(unsigned l=0;l<CAE_MAX_CONNECTIONS;l++) {
+	    if((meter_port[l]>0)&&update_meters[i][l]) {
+	      SendMeterUpdate(QString().sprintf("MS %d %d %d %d",i,j,k,
+					  output_status_flag[i][j][k]),l);
+	    }
+	  }
 	}
       }
     }
@@ -2351,23 +2374,20 @@ void MainObject::SendMeterOutputStatusUpdate()
 
 void MainObject::SendMeterOutputStatusUpdate(int card,int port,int stream)
 {
-  char msg[1500];
-  int n;
-  n=snprintf(msg,1500,"MS %d %d %d %d",card,port,stream,
-	     output_status_flag[card][port][stream]);
-  SendMeterUpdate(msg,n);
-}
-
-
-void MainObject::SendMeterUpdate(const char *msg,unsigned len)
-{
-  for(unsigned i=0;i<CAE_MAX_CONNECTIONS;i++) {
-    if(meter_port[i]>0) {
-      meter_socket->writeBlock(msg,len,socket[i]->peerAddress(),meter_port[i]);
+  for(unsigned l=0;l<CAE_MAX_CONNECTIONS;l++) {
+    if((meter_port[l]>0)&&update_meters[card][l]) {
+      SendMeterUpdate(QString().sprintf("MS %d %d %d %d",card,port,stream,
+				  output_status_flag[card][port][stream]),l);
     }
   }
 }
 
+void MainObject::SendMeterUpdate(const QString &msg,int conn_id)
+{
+  meter_socket->writeBlock(msg,msg.length(),socket[conn_id]->peerAddress(),
+			   meter_port[conn_id]);
+}
+
 
 int main(int argc,char *argv[])
 {
diff --git a/cae/cae.h b/cae/cae.h
index 77d11e6f..0a5fecd7 100644
--- a/cae/cae.h
+++ b/cae/cae.h
@@ -142,7 +142,7 @@ class MainObject : public QObject
   void SendMeterPositionUpdate(int cardnum,unsigned pos[]);
   void SendMeterOutputStatusUpdate();
   void SendMeterOutputStatusUpdate(int card,int port,int stream);
-  void SendMeterUpdate(const char *msg,unsigned len);
+  void SendMeterUpdate(const QString &msg,int conn_id);
   bool debug;
   unsigned system_sample_rate;
   Q_INT16 tcp_port;
@@ -165,6 +165,7 @@ class MainObject : public QObject
   bool play_pitch[RD_MAX_CARDS][RD_MAX_STREAMS];
   bool port_status[RD_MAX_CARDS][RD_MAX_PORTS];
   bool output_status_flag[RD_MAX_CARDS][RD_MAX_PORTS][RD_MAX_STREAMS];
+  bool update_meters[RD_MAX_CARDS][CAE_MAX_CONNECTIONS];
   struct {
     int card;
     int stream;
diff --git a/docs/apis/cae.xml b/docs/apis/cae.xml
index f26ee313..72ec24c3 100644
--- a/docs/apis/cae.xml
+++ b/docs/apis/cae.xml
@@ -1459,11 +1459,14 @@
   <sect2>
     <title><command>Meter Enable</command></title>
     <para>
-      Set UDP port to whcih to send meter update messages.
+      Set UDP port to which to send meter update messages for the specified
+      card(s).
     </para>
     <para>
       <userinput>ME
-      <replaceable>udp-port</replaceable>!</userinput>
+      <replaceable>udp-port</replaceable>
+      <replaceable>card0</replaceable>
+      <replaceable>..</replaceable>!</userinput>
     </para>
     <variablelist>
       <varlistentry>
@@ -1476,6 +1479,16 @@
 	  </para>
 	</listitem>
       </varlistentry>
+      <varlistentry>
+	<term>
+	  <replaceable>card0</replaceable>
+	</term>
+	<listitem>
+	  <para>
+	    Audio card number for which to send updates.
+	  </para>
+	</listitem>
+      </varlistentry>
     </variablelist>
   </sect2>
 </sect1>
diff --git a/lib/rdcae.cpp b/lib/rdcae.cpp
index 0e17be95..3bc9e46e 100644
--- a/lib/rdcae.cpp
+++ b/lib/rdcae.cpp
@@ -118,10 +118,30 @@ void RDCae::connectHost()
 	SendCommand(QString().sprintf("IS %d %d!",i,j));
       }
     }
-    SendCommand(QString().sprintf("ME %u!",cae_meter_socket->port()));
   }
 }
 
+
+void RDCae::enableMetering(std::vector<int> *cards)
+{
+  QString cmd=QString().sprintf("ME %u",cae_meter_socket->port());
+  for(unsigned i=0;i<cards->size();i++) {
+    if(cards->at(i)>=0) {
+      bool found=false;
+      for(unsigned j=0;j<i;j++) {
+	if(cards->at(i)==cards->at(j)) {
+	  found=true;
+	}
+      }
+      if(!found) {
+	cmd+=QString().sprintf(" %d",cards->at(i));
+      }
+    }
+  }
+  SendCommand(cmd+"!");
+}
+
+
 bool RDCae::loadPlay(int card,QString name,int *stream,int *handle)
 {
   int count=0;
diff --git a/lib/rdcae.h b/lib/rdcae.h
index 60ac5856..47a7990b 100644
--- a/lib/rdcae.h
+++ b/lib/rdcae.h
@@ -45,6 +45,7 @@ class RDCae : public QObject
   RDCae(RDStation *station,RDConfig *config,QObject *parent=0);
   ~RDCae();
   void connectHost();
+  void enableMetering(std::vector<int> *cards);
   bool loadPlay(int card,QString name,int *stream,int *handle);
   void unloadPlay(int handle);
   void positionPlay(int handle,int pos);
@@ -127,4 +128,4 @@ class RDCae : public QObject
 };
 
 
-#endif 
+#endif  // RDCAE_H
diff --git a/rdairplay/rdairplay.cpp b/rdairplay/rdairplay.cpp
index 224a292f..5b9177ee 100644
--- a/rdairplay/rdairplay.cpp
+++ b/rdairplay/rdairplay.cpp
@@ -304,6 +304,8 @@ MainWidget::MainWidget(QWidget *parent)
   //
   // CAE Connection
   //
+  connect(rda->cae(),SIGNAL(isConnected(bool)),
+	  this,SLOT(caeConnectedData(bool)));
   rda->cae()->connectHost();
 
   //
@@ -315,7 +317,7 @@ MainWidget::MainWidget(QWidget *parent)
   //
   // RIPC Connection
   //
-  connect(rda->ripc(),SIGNAL(connected(bool)),this,SLOT(ripcConnected(bool)));
+  connect(rda->ripc(),SIGNAL(connected(bool)),this,SLOT(ripcConnectedData(bool)));
   connect(rda,SIGNAL(userChanged()),this,SLOT(userData()));
   connect(rda->ripc(),SIGNAL(rmlReceived(RDMacro *)),
 	  this,SLOT(rmlReceivedData(RDMacro *)));
@@ -914,7 +916,24 @@ QSizePolicy MainWidget::sizePolicy() const
 }
 
 
-void MainWidget::ripcConnected(bool state)
+void MainWidget::caeConnectedData(bool state)
+{
+  std::vector<int> cards;
+
+  cards.push_back(rda->airplayConf()->card(RDAirPlayConf::MainLog1Channel));
+  cards.push_back(rda->airplayConf()->card(RDAirPlayConf::MainLog2Channel));
+  cards.push_back(rda->airplayConf()->card(RDAirPlayConf::AuxLog1Channel));
+  cards.push_back(rda->airplayConf()->card(RDAirPlayConf::AuxLog2Channel));
+  cards.push_back(rda->airplayConf()->card(RDAirPlayConf::SoundPanel1Channel));
+  cards.push_back(rda->airplayConf()->card(RDAirPlayConf::SoundPanel2Channel));
+  cards.push_back(rda->airplayConf()->card(RDAirPlayConf::SoundPanel3Channel));
+  cards.push_back(rda->airplayConf()->card(RDAirPlayConf::SoundPanel4Channel));
+  cards.push_back(rda->airplayConf()->card(RDAirPlayConf::SoundPanel5Channel));
+  rda->cae()->enableMetering(&cards);
+}
+
+
+void MainWidget::ripcConnectedData(bool state)
 {
   QString logname;
   QHostAddress addr;
diff --git a/rdairplay/rdairplay.h b/rdairplay/rdairplay.h
index d5b7610b..6715b2db 100644
--- a/rdairplay/rdairplay.h
+++ b/rdairplay/rdairplay.h
@@ -98,7 +98,8 @@ class MainWidget : public QWidget
 
  private slots:
   void logLine(RDConfig::LogPriority prio,const QString &msg);
-  void ripcConnected(bool state);
+  void caeConnectedData(bool state);
+  void ripcConnectedData(bool state);
   void rmlReceivedData(RDMacro *rml);
   void gpiStateChangedData(int matrix,int line,bool state);
   void logChannelStartedData(int id,int mport,int card,int port);
diff --git a/rdcartslots/rdcartslots.cpp b/rdcartslots/rdcartslots.cpp
index 31d10799..90092903 100644
--- a/rdcartslots/rdcartslots.cpp
+++ b/rdcartslots/rdcartslots.cpp
@@ -37,6 +37,7 @@
 #include <rdapplication.h>
 #include <rdcheck_daemons.h>
 #include <rddbheartbeat.h>
+#include <rdescape_string.h>
 
 #include "rdcartslots.h"
 
@@ -92,6 +93,8 @@ MainWidget::MainWidget(QWidget *parent)
   //
   // CAE Connection
   //
+  connect(rda->cae(),SIGNAL(isConnected(bool)),
+	  this,SLOT(caeConnectedData(bool)));
   rda->cae()->connectHost();
 
   //
@@ -166,6 +169,22 @@ QSize MainWidget::sizeHint() const
 }
 
 
+void MainWidget::caeConnectedData(bool state)
+{
+  std::vector<int> cards;
+
+  QString sql=QString("select CARD from CARTSLOTS where ")+
+    "STATION_NAME=\""+RDEscapeString(rda->config()->stationName())+"\"";
+  RDSqlQuery *q=new RDSqlQuery(sql);
+  while(q->next()) {
+   cards.push_back(q->value(0).toInt());
+  }
+  delete q;
+
+  rda->cae()->enableMetering(&cards);
+}
+
+
 void MainWidget::rmlReceivedData(RDMacro *rml)
 {
   RunLocalMacros(rml);
diff --git a/rdcartslots/rdcartslots.h b/rdcartslots/rdcartslots.h
index 12481165..6f7f9b09 100644
--- a/rdcartslots/rdcartslots.h
+++ b/rdcartslots/rdcartslots.h
@@ -56,6 +56,7 @@ class MainWidget : public QWidget
   QSizePolicy sizePolicy() const;
 
  private slots:
+  void caeConnectedData(bool state);
   void userData();
   void rmlReceivedData(RDMacro *rml);
 
@@ -66,12 +67,6 @@ class MainWidget : public QWidget
  private:
   void RunLocalMacros(RDMacro *rml);
   void SetCaption();
-  //  RDConfig *panel_config;
-  //  RDCae *panel_cae;
-  //  RDRipc *panel_ripc;
-  //  RDUser *panel_user;
-  //  RDStation *panel_station;
-  //  RDSystem *panel_system;
   RDEventPlayer *panel_player;
   QPixmap *lib_rivendell_map;
   QString panel_filter;
diff --git a/rdlibrary/rdlibrary.cpp b/rdlibrary/rdlibrary.cpp
index 7a59c6f1..73bee352 100644
--- a/rdlibrary/rdlibrary.cpp
+++ b/rdlibrary/rdlibrary.cpp
@@ -190,6 +190,8 @@ MainWidget::MainWidget(QWidget *parent)
   //
   // CAE Connection
   //
+  connect(rda->cae(),SIGNAL(isConnected(bool)),
+	  this,SLOT(caeConnectedData(bool)));
   rda->cae()->connectHost();
 
   //
@@ -483,6 +485,17 @@ QSizePolicy MainWidget::sizePolicy() const
 }
 
 
+void MainWidget::caeConnectedData(bool state)
+{
+  if(state) {
+    std::vector<int> cards;
+    cards.push_back(rda->libraryConf()->inputCard());
+    cards.push_back(rda->libraryConf()->outputCard());
+    rda->cae()->enableMetering(&cards);
+  }
+}
+
+
 void MainWidget::userData()
 {
   QString sql;
diff --git a/rdlibrary/rdlibrary.h b/rdlibrary/rdlibrary.h
index 51820397..a9ef7120 100644
--- a/rdlibrary/rdlibrary.h
+++ b/rdlibrary/rdlibrary.h
@@ -70,6 +70,7 @@ class MainWidget : public QWidget
   QSizePolicy sizePolicy() const;
 
  private slots:
+  void caeConnectedData(bool state);
   void userData();
   void filterChangedData(const QString &str);
   void searchClickedData();
diff --git a/rdpanel/rdpanel.cpp b/rdpanel/rdpanel.cpp
index 74c21c9d..bcd31b0d 100644
--- a/rdpanel/rdpanel.cpp
+++ b/rdpanel/rdpanel.cpp
@@ -145,6 +145,8 @@ MainWidget::MainWidget(QWidget *parent)
   //
   // CAE Connection
   //
+  connect(rda->cae(),SIGNAL(isConnected(bool)),
+	  this,SLOT(caeConnectedData(bool)));
   rda->cae()->connectHost();
 
   //
@@ -342,6 +344,19 @@ QSizePolicy MainWidget::sizePolicy() const
 }
 
 
+void MainWidget::caeConnectedData(bool state)
+{
+  std::vector<int> cards;
+
+  cards.push_back(rda->airplayConf()->card(RDAirPlayConf::SoundPanel1Channel));
+  cards.push_back(rda->airplayConf()->card(RDAirPlayConf::SoundPanel2Channel));
+  cards.push_back(rda->airplayConf()->card(RDAirPlayConf::SoundPanel3Channel));
+  cards.push_back(rda->airplayConf()->card(RDAirPlayConf::SoundPanel4Channel));
+  cards.push_back(rda->airplayConf()->card(RDAirPlayConf::SoundPanel5Channel));
+  rda->cae()->enableMetering(&cards);
+}
+
+
 void MainWidget::userData()
 {
   SetCaption();
diff --git a/rdpanel/rdpanel.h b/rdpanel/rdpanel.h
index 2d56124f..ed75569b 100644
--- a/rdpanel/rdpanel.h
+++ b/rdpanel/rdpanel.h
@@ -49,6 +49,7 @@ class MainWidget : public QWidget
   QSizePolicy sizePolicy() const;
 
  private slots:
+  void caeConnectedData(bool state);
   void userData();
   void masterTimerData();
   void meterData();