WAVES Sliverが66%引きの2万円? https://mixingmusicpro.com/blog/dtm-daw-software-plugin/waves-sliver%e3%81%8c66%ef%bc%85%e5%bc%95%e3%81%8d%e3%81%ae2%e4%b8%87%e5%86%86%ef%bc%9f/