status_bar duration

status_bar = Label(root, text="", bd=1, relief=GROOVE, anchor=E)
status_bar.pack(fill=X, side=BOTTOM, ipady=2)


def play_time():
    current_time = pygame.mixer.music.get_pos() / 1000

    converted_current_time = time.strftime("%M:%S", time.gmtime(current_time))

    current_song = song_box.curselection()

    song = song_box.get(current_song)

    song = f"C:/gui/audio/{song}.mp3"

    song_mut = MP3(song)

    song_length = song_mut.info.length

    converted_song_length = time.strftime("%M:%S", time.gmtime(song_length))

    status_bar.config(text=f"Time Elapsed: {converted_current_time} of {converted_song_length}  ")

    status_bar.after(1000, play_time)

# В края на функцията stop добави
# status_bar.config(text="")

# и промени song = song_box.get(current_song) на song = song_box.get(ACTIVE)