難題

難題 is a melancholic song by 巴奈 with a tempo of 135 BPM. It can also be used half-time at 68 BPM or double-time at 270 BPM. The track runs 3 minutes and 38 seconds long with a F key and a major mode. It has low energy and is not very danceable with a time signature of 4 beats per bar .