How to get rid of the beep sound before starting to play an mp3 file through a PyQt 5 module?

Question

Python

My little code creates a play_btn button on the main application window. This button is associated with the play_song() method of the MyWindow class. The play_song() method sets the source for the player to play. In this case, the source is the self.list element, which stores paths to mp3 files.

Clicking on the play_btn button does start the song playing, but there may be a short electronic sound before that. This sound is independent of the audio file to be played. It began to appear after installing the latest version of the K-Lite codec pack . Codecs have become necessary for me, because. some mp3 files refused to be played by the PyQt 5 module. Audio files that were not played before the codecs were installed now startbe played without this sound . Before starting playback of audio files that were played before the codecs were installed, this sound appears.

Please tell me how can I get rid of this beep? The method of trying to cut off the beginning of the composition, I now know, it does not quite suit me.

from PyQt5 import QtCore, QtWidgets, QtMultimedia

class MyWindow(QtWidgets.QWidget):
    def __init__(self, parent=None):
        super().__init__(parent)

        self.list = ['1.Papercut.mp3', '13.Numb.mp3']

        self.player = QtMultimedia.QMediaPlayer()

        self.box = QtWidgets.QGridLayout(self)      

        play_btn = QtWidgets.QPushButton('Play', clicked = self.play_song)
        self.box.addWidget(play_btn, 0, 0)

    # Воспроизведение
    def play_song(self):
        self.player.setMedia(QtMultimedia.QMediaContent(QtCore.QUrl(self.list[1])))
        self.player.play()


if __name__ == '__main__':
    import sys
    app = QtWidgets.QApplication(sys.argv)
    window = MyWindow()
    window.setWindowTitle('MP3-player, PyQt5')
    window.show()
    sys.exit(app.exec_())