https://doujinblog.org/%e5%90%8c%e4%ba%ba%e3%82%b2%e3%83%bc%e3%83%a0190531-hooksoft-e%e3%82%b9%e3%82%af%e3%83%bc%e3%83%ab%e3%83%a9%e3%82%a4%e3%83%95-e%e5%88%9d%e5%9b%9e%e7%89%88-soundtrack-custom-patch-theme/