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	Environment Walls Doors Shops Encounters

	Miscellaneous Miscellaneous FAQ Tips & Tricks Pre-Captive Bugs Did You Know? Tools

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Sounds

The sounds of Captive were created using Aegis’s "Audio Master II" sound sampler. They were all merged into a single block of sound under the 8SVX file format, a subformat of IFF (Interchangeable File Format) commonly used on the Amiga. The result is a 52k, 8-bit mono PCM sampled sound file and you can click here to download a copy of it.

Even though the file has 26 recorded sound samples, Captive generates 52 different sounds by manipulating the pitch. For example, the sound generated by the "Critter" encounter is the exact same sound sample used for the "Dog" encounter, but played much faster.

Click here to hear the sound of a Dog
Click here to hear the sound of a Critter

Below is a table listing the 52 generated sounds sorted by their offset in the sound file.

ID	Offset	Length (bytes)	Time (ms)	Pitch	Sound
1	104	2707	484	78	Automatic weapon (Booster, ED209, etc.)
2	2812	2004	356	78	Reloading
3	4816	1087	196	130	Moving elevator
4				128	Moving elevator
5				128	Moving elevator
6				126	Moving elevator
7				124	Moving elevator
8				150	Moving elevator
9				146	Moving elevator
10				144	Moving elevator
11				140	Moving elevator
12				138	Moving elevator
13				134	Moving elevator
14				132	Moving elevator
15	5904	2029	359	74	Laser shot
16	7934	1619	288	94	Spraygun shot
17	9554	1523	274	74	Metallic hit
18	9554	1523	274	88	Metallic hit
19	11078	513	254	66	Wall hit
20	11592	913	174	68	Electric bolt
21	12506	1989	355	88	Door opening/closing
22	14496	967	172	62	Ball bouncing
23	15464	2431	436	53	Shot of a handgun
24				74	Shot of a riffle
25				82	Shot of a cannon
26				92	Raiser wall hitting ground
27	17898	445	80	66	Tiny 'Tick!'
28	18352	1863	336	102	Iris door opening/closing
29	18352	1863	336	57	Laser door opening/closing
30	20232	2081	376	132	Moving raiser wall
31	22342	897	162	100	Brawling/Sword swing
32	23246	3565	639	43	Bag of gold
33	26814	1768	315	94	Droid receiving damage
34	28586	1967	355	78	Droid bumping fire
35	30558	1495	267	92	Droid receiving damage by bumping a solid object
36	32056	2415	436	92	Hitting a metallic door
37	34472	2938	519	110	Chest put back into place
38	37406	5431	972	68	Explosion
39				76	Explosion
40				84	Explosion
41				100	Explosion
42				106	Explosion
43				118	Explosion
44				130	Explosion
45				146	Explosion
46	42852	4235	756	122	Dragon / Diplocus
47				90	Tyrana / Dog
48				49	Critter
49	47088	615	110	49	Pod fire
50	47704	2903	519	110	Fire (encounter) / Terradak
51	47704	2903	519	55	Tree (encounter) / Lizard
52	50610	1591	284	108	Minor / Guard punch / Tripos

A special operation is made when the system is requested to play sound ID 33, 34 or 35. The operation consists of randomly selecting a pitch in order to put variety and more realism in what shouldn't be an identical sound each time it's played. In this case, the hardcoded pitch specified in the table above is offseted by a random value between -4 and +3.

You probably noticed that there are 12 different sound entries for the elevator movement when, in fact, we always hear only one in Captive 1.0. While moving, the sound manager does use each entry one by one to give the "auditive illusion" of an elevator going up or down, thanks to the different pitch in each entry. For some reason, (a bug?) Captive 1.0 doesn't handle the pitch variance compared to Captive 1.2 that has this feature working. The same goes for explosion sounds as a stronger explosion will have a lower pitch than a weaker explosion.

Sound Priorities

Since the system can only play one sound at a time, it would really sound strange if the sound of an explosion would abruptly be silenced by the sound of an electric bolt. To prevent such a thing from happenning, the sounds have priorities. If a requested sound has a lower priority than a sound currently being played, it will be ignored.

Priority	Sound
1	Explosion
2	Chest put back into place
3	Tiny 'Tick!'
	Droid receiving damage
	Droid bumping fire
	Droid receiving damage by bumping an object
4	Metallic hit
5	Reloading
6	Bag of gold
7	Moving raiser wall
7	Raiser wall hitting ground
8	Door opening/closing
	Iris door opening/closing
	Laser door opening/closing
9	Dragon / Diplocus
	Tyrana / Dog
	Minor / Guard punch / Tripos
	Pod fire
	Fire (encounter) / Terradak
	Tree (encounter) / Lizard
	Critter
10	Spraygun shot
10	Shot of a cannon
11	Laser shot
12	Automatic weapon (Booster, ED209, etc.)
12	Shot of a riffle
13	Shot of a handgun
14	Brawling/Sword swing
15	Moving elevator
16	Wall hit
16	Hitting a metallic door
17	Ball bouncing
18	Electric bolt

Stereophonic Sound

An attempt was made to make the Atari version in stereo, but a problem appeared and the programmer had to force the audio to be mono for release of version 1.0, hoping to solve it for the next release. The existing binary of Captive 1.0 can be manipulated to successfully turn on stereo sounds, but the sound samples are then played twice faster than they should. It is assumed that this is the problem the programmer had to fix.

In Captive 1.2, the code that was meant to support stereo sounds has been completely removed.