VG song(s) continuous twitter, 60 VG song(s) approximately; not discrete, 8 VG song(s) approximately, 10 VG song(s) approximately, VG call(s) continuous, VG call(s) continuous, 16 VG song(s) approximately, VG song(s) continuous, VG song(s) response to playback, 10 VG song(s) , 37 VG song(s) approximately; last few very faint, VG call(s)