The Insider (Earned 7 Nomination at Academy Awards 2000)came our on Movie Theaters 5 November 1999,21 years ago telling us Warning: Exposing the Truth May Be Hazardous.
Apparently an awkward film, it is not a sheer coincidence if Touchstone home video has been supplying it erratically in Italy for several years, both in DVD and in VHS version, by labelling that as commercial strategy, it deserves, however, a careful analysys as far as the extraordinary music component is concerned.
At first, Graeme Revell (The Crow) should have been the only composer for the film but Michael Mann, because of the good relationship set up while working for Heat, asked Lisa Gerrard and Pieter Bourke (both exes of the group Dead Can Dance) their collaboration for The Insider by asking,at first,their permission to use two tracks from their album Duality(Tempest and Sacrifice).
Only after having listened to a demo DAT with some inspired music tracks(in addition to having been composed not specifically targeted to the film core and situation), he decided to assign them the bulk of the music composition, having them working directly on some shots.
It has also been essential the contribution of the music supervisor and composer Curt Sobel (already collaborator for Heat as musical advisor and, previously, of the Tangerine Dream), a habitué in improving the “sound visibility” of a feature film and it is not a coincidence that a couple of unpublished pieces of him have been used to emphasise some part of The Insider.
Bourke and Gerrard decided to mix their initial demo tracks as if they were the final finished composition; this kind of choice seems to have remarkably affected Michael Mann’s eventual decision.
Production Featurette itself, included in the DVD, has unpublished pieces expressly composed by Lisa Gerrard and Pieter Bourke but not used in the film(Example see the “ escort to the Court ‘s” scene)
Among the tracks omitted in the official score CD there is one called Meltdown Precursor; this deep and touching piece begins when Jeffrey Wigand is having lunch and understands from TV that a slanderous campaign against him is going on; the piece ends while the already known moving and hypnotic Meltdown starts.
As far as other pieces omitted from the official score are concerned I quote below a short list. Unfortunately, the very difficult availability of some piece hinders me from matching them with the related scenes, but for the three last mentioned:

-Uotaaref Men Elihabek Cashbah Orchestra
-Smokey Mountain Waltz Richard Gilks
-Suffocate & Night Stop Curt Sobel
-Hot Shots Curt Sobel
-Armenia by Einstűrzende Neubauten
(Jeffrey gets home and finds out he has bodyguards)
-Two or Three Things by David Darling (Jeffrey is abandoned by his wife)
taken from the album Cello
-Litany by Arvo Part (Jeffrey at the golf course)
taken from the album Litany
*The pieces Tempest (Opening Sequence)and Sacrifice composed by Lisa Gerrard and Pieter Bourke are included in the album Duality(4ad)

​

THE INSIDER Columbia Sony Catalog#: 496458 2 - MOCCD 13486

1 Tempest Lisa Gerrard 2:52
2 Dawn of the Truth 2:00
3 Sacrifice 7:42
4 The Subordinate 1:17
5 Exile 1:40
6 The Silencer 1:39
7 Broken 2:04
8 Faith 3:02
9 I'm Alone on This Graeme Revell 2:02
10 LB in Montana Graeme Revell 0:51
11 Palladino Montage Graeme Revell 0:45
12 Iguazu - Gustavo Santolalla 3:12
13 Liquid Moon 4:06
14 Rites [Special Edit for the Film] - Jan Garbarek 5:34
15 Safe from Harm [Perfecto Mix] - Massive Attack 8:14
16 Meltdown 5:41

The pieces 1-8/ 13,16 have been composed, arranged and directed by Lisa Gerrard and Pieter Bourke