For Espier Screen Locker, enable Widget switcher on the Settings page and select Espier Music Controller (Lock Screen) or other widget in 4x1 or 5x1 size. After this, you can slide the time region horizontally on the lock screen to show the widget.
For Espier Screen Locker iOS7, enable Widget switcher on the Settings page and select Espier Music Controller iOS7 (Lock Screen) or other widget in 4x1` or 5x1 size. After this, you can slide the time region vertically on the lock screen to show the widget.