本曲提供多版本支持，购买后可以获得以下所有的5个版本：
版本 1 02:15版本 2 01:32版本 3 01:03版本 4 00:20版本 5 00:20

Documentary background music with beautiful piano and strings. This soundtrack perfect for advertising, presentations, documentary trailer, documentary film, documentary movie, romantic video, timelapse video history and much more…

This item includes 5 versions (wav) in zip file:
The Documentary Main (2:14)
The Documentary Middle (1:31)
The Documentary Short (1:02)
The Documentary Loop 1 (0:19)
The Documentary Loop 2 (0:19)
纪录片背景音乐，采用了唯美的钢琴和弦乐。适合广告，演示，纪录片预告片，纪录片，纪录片电影，浪漫的视频，延时摄影的视频历史和更多…