Signal is the fortieth album by jazz fusion group Casiopea and their first collaborative studio album with Synchronized DNA, a drum duo comprising former and current Casiopea member Akira Jimbo and former T-SQUARE drummer Hiroyuki Noritake, recorded and released in 2005. Issei Noro put Casiopea on hiatus in the year after, but reactivated the group with new keyboardist Kiyomi Otaka taking the place of Minoru Mukaiya in 2012.

CASIOPEA are

Synchronized DNA are

Note that on this particular album, Akira Jimbo's drums are hard-panned to the left speaker/headphone and Hiroyuki Noritake's drums are hard-panned to the Right.

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