Alteration is the debut album by Australian/Indonesian band Altera Enigma, recorded over 2 years and released in January 2006.

[2][3] The emotional and sophisticated style found on the album drew comparisons to Liquid Tension Experiment, Gordian Knot, and Cynic.

[3] A music video was released for the bonus/outtake track "Perpetual Motion".

[4] Alteration mainly features a mixture of progressive metal and jazz fusion, but contains many other diverse musical styles such as electronica and dark ambient.

[1] Jason DeRon has stated in an interview that while he does not like the term "progressive metal", he feels that it is the closest description that can be used.