diff --git a/play_group.py b/play_group.py
index 1ce50a1..88e37ec 100755
--- a/play_group.py
+++ b/play_group.py
@@ -28,31 +28,82 @@ __version__ = '0.1a'
 __email__ = 'n0mjs@me.com'
 __status__ = 'pre-alpha'
 
-filename = '../../test.ipsc'
+# Constants for this application
+#
+BURST_DATA_TYPE = {
+    'VOICE_HEAD':  '\x01',
+    'VOICE_TERM':  '\x02',
+    'SLOT1_VOICE': '\x0A',
+    'SLOT2_VOICE': '\x8A'   
+}
+
+# path+filename for the transmission to play back
+filename = '../test.pickle'
+
+# groups that we want to trigger playback of this file (ts1 and ts2)
+trigger_groups_1 = ['\x00\x00\x02', '\x00\x00\x03']
+trigger_groups_2 = ['\x00\x00\x02', '\x00\x00\x03']
 
 class playIPSC(IPSC):
     
     def __init__(self, *args, **kwargs):
         IPSC.__init__(self, *args, **kwargs)
         self.CALL_DATA = []
+        self.event_id = 1
         
     #************************************************
     #     CALLBACK FUNCTIONS FOR USER PACKET TYPES
     #************************************************
     #
-    def group_voice(self, _network, _src_sub, _dst_sub, _ts, _end, _peerid, _data):
+    def group_voice(self, _network, _src_sub, _dst_group, _ts, _end, _peerid, _data):
         if _end:
-            if True:
+            if (_ts == 0 and _dst_group in trigger_groups_1) or (_ts == 1 and _dst_group in trigger_groups_2) :
+                logger.info('(Event ID: %s) Playback triggered from TS %s, TGID %s', self.event_id, (_ts +1), _dst_group)
+                # Determine the type of voice packet this is (see top of file for possible types)
+                _burst_data_type = _data[30]
+                if _ts == 0:
+                    _TS = 'TS1'
+                elif _ts == 1:
+                    _TS = 'TS2'
+                    
                 time.sleep(2)
                 self.CALL_DATA = pickle.load(open(filename, 'rb'))
+                logger.info('(Event ID: %s) Playing back file: %s', self.event_id, filename)
                 for i in self.CALL_DATA:
                     _tmp_data = i
+                    
+                    # re-Write the peer radio ID to that of this program
                     _tmp_data = _tmp_data.replace(_peerid, NETWORK[_network]['LOCAL']['RADIO_ID'])
+                    
+                    # re-Write the source subscriber ID to that of this program
+                    _tmp_data = _tmp_data.replace(_src_sub, NETWORK[_network]['LOCAL']['RADIO_ID'])
+                    
+                    # Re-Write IPSC timeslot value
+                    _call_info = int_id(_data[17:18])
+                    if _ts == 0:
+                        _call_info &= ~(1 << 5)
+                    elif _ts == 1:
+                        _call_info |= 1 << 5
+                    _call_info = chr(_call_info)
+                    _tmp_data = _tmp_data[:17] + _call_info + _tmp_data[18:]
+                    
+                    # Re-Write DMR timeslot value
+                    # Determine if the slot is present, so we can translate if need be
+                    if _burst_data_type == BURST_DATA_TYPE['SLOT1_VOICE'] or _burst_data_type == BURST_DATA_TYPE['SLOT2_VOICE']:
+                        # Re-Write timeslot if necessary...
+                        if _ts == 0:
+                            _burst_data_type = BURST_DATA_TYPE['SLOT1_VOICE']
+                        elif _ts == 1:
+                            _burst_data_type = BURST_DATA_TYPE['SLOT2_VOICE']
+                        _tmp_data = _tmp_data[:30] + _burst_data_type + _tmp_data[31:]
+                    
                     _tmp_data = self.hashed_packet(NETWORK[_network]['LOCAL']['AUTH_KEY'], _tmp_data)
                     # Send the packet to all peers in the target IPSC
                     self.send_to_ipsc(_tmp_data)
                     time.sleep(0.06)
                 self.CALL_DATA = []
+                logger.info('(Event ID: %s) Playback Completed', self.event_id)
+                self.event_id = self.event_id + 1
         
 if __name__ == '__main__':
     logger.info('DMRlink \'record.py\' (c) 2014 N0MJS & the K0USY Group - SYSTEM STARTING...')