QMediaPlayer version. Not working

main.py

@@ -6,7 +6,10 @@ from PyQt5.QtWidgets import (QMainWindow,
                              QMessageBox,)
 from PyQt5.QtGui import QPixmap
 from PyQt5 import uic
-from PyQt5.QtCore import QFileInfo
+from PyQt5.QtCore import QFileInfo, QSize
+import qtawesome as qta
+
+from audio_player import AudioPlayer
 
 qt_creator_file = "main_window.ui"
 
@@ -20,7 +23,24 @@ class MyApp(QMainWindow, Ui_MainWindow):
         self.load_db()
         self.display_signals()
         self.search_bar.textChanged.connect(self.display_signals)
-        self.result_list.itemSelectionChanged.connect(self.display_spectrogram)
+        self.result_list.itemSelectionChanged.connect(self.display_specs)
+        self.play.setIcon(qta.icon('fa5.play-circle',
+            color = "#7a7a7a",
+            color_active = '#1d5eff'))
+        self.play.setIconSize(self.play.size())
+        self.pause.setIcon(qta.icon('fa5.pause-circle',
+            color = "#7a7a7a",
+            color_active = '#1d5eff'))
+        self.pause.setIconSize(self.pause.size())
+        self.stop.setIcon(qta.icon('fa5.stop-circle',
+            color = "#7a7a7a",
+            color_active = '#1d5eff'))
+        self.stop.setIconSize(self.stop.size())
+        self.audio_widget = AudioPlayer(self.play, 
+                                         self.pause, 
+                                         self.stop, 
+                                         self.volume, 
+                                         self.audio_progress)
 
     def load_db(self):
         try:
@@ -48,6 +68,10 @@ class MyApp(QMainWindow, Ui_MainWindow):
             if self.search_bar.text().lower() in signal.lower():
                 self.result_list.addItem(signal)
 
+    def display_specs(self):
+        self.display_spectrogram()
+        self.audio_widget.set_audio_player(self.result_list.currentItem().text())
+
     def display_spectrogram(self):
         spectrogram_name = self.result_list.currentItem().text()
         path_spectr = os.path.join("Data", "Spectra", spectrogram_name + ".jpg")