Substatic is the fourth solo album by New Zealand composer Peter Jefferies, released on September 29, 1998 through Emperor Jones.

One of his most musically ambitious and emotionally complex efforts, it marks Jefferies' return to the completely instrumental format he had previously explored on his 1987 album At Swim 2 Birds.

The piece "Index" includes sampled vocals of Jean Smith of Mecca Normal, taken from a 1995 live performance.

"[5] Ned Raggett of allmusic gave it three out of five stars and called it a "striking, varied album" with "intentionally and beautifully murky production.

"[3] All music is composed by Peter Jefferies, except "Three Movements" co-written by Michael Hill and Anita Galitis-Anker