開発者プレビューバージョン
Only use this version for testing. The official stable version is available at:
http://bit.do/bwstable
The purpose of this release is to test new audio engines to improve device compatibility, since Android has a wide range of versions and devices, and it is impossible for us to test at all.
We kindly ask you to help us improve this version by emailing your suggestions and notes for any errors you may encounter.