Update player_functions.py

def resetDevice(device_id,mode='GS'):

    fn_prefix="player_functions.py/resetDevice"

    if(mode=="GM"):

        statusmsg=f"Performing GM Reset"

        updateDisplay(str.encode(statusmsg))

        # send the sysex command for a GM Start to the synth using amidi

        subprocess.run(['amidi','-p',device_id,'-S','F07E7F0901F7'])

        print(fn_prefix+":Reset device to GM Mode")

    elif mode=="GS":

        statusmsg=f"Performing GS Reset"

        updateDisplay(str.encode(statusmsg))

        # send the sysex command for a GS Reset to the synth using amidi

        subprocess.run(['amidi','-p',device_id,'-S','F04110421240007F0041F7'])

        print(fn_prefix+": Reset device to GS Mode")

            # or a finished track, terminate the subprocess if it hasn't already been

            proc.terminate()

            print(fn_prefix+": Recieved stop command")

            statusmsg=f"Stopped: Finished playing"

            updateDisplay(str.encode(statusmsg))

            # send a GS reset to the synth

            resetDevice(findAMIDIDevice(),"GS")

            return