Jun Senoue on Twitter:
![](https://3.bp.blogspot.com/-iYi1SPYYeu0/V9kK425XoDI/AAAAAAAANtM/D1CvjkRkLE4x2M8wnYUBXmKwpgoScMTmgCPcB/s710/sonic-adventure-2-original-sound-track-multi-dimensional-discs-duo-case.jpg)
Among the Sonic-related soundtracks, this surface design is one of my favorites. At that time, I thought if the atmosphere of facing left and right would appear, having the mystery of the arrangement above the duo case that I’d used.