Spell noise

Version 0.14: This article may not be up to date for the latest stable release of Crawl.

Spell noise is the noise generated when casting spells.

How noise is determined

There is a casting noise which is the spell level with factor applied (rounded up). The factor is 1 for conjuration spells, 1/2 for poison and air spells and 3/4 for the others.

A modifier (noise_mod) can be set in spl-data.h to change this base casting noise. It is added to the spell level before applying the school-dependant factor. The noise will be made at the caster's position.

A second source of noise is the spell itself. The noise will be made at the target's position. Some number of spells don't make any noise at all, like Bolt of Draining, and they end up with a noise of 0. For bolt spells, the noise is made at each square where it hits a monster, and the last square the spell reached even if it doesn't hit anything.

Spell noise

Spell	Caster	Target
Abjuration	3	0
Agony	4	0
Airstrike	2	4
Alistair's Intoxication	2	0
Animate Dead	3	0
Animate Skeleton	1	0
Apportation	1	0 (30 when apporting the Orb of Zot)
Aura of Abjuration	5	0
Beastly Appendage	1	0
Blade Hands	4	0
Blink	2 (at the destination)	0
Bolt of Cold	6	6
Bolt of Draining	2	0
Bolt of Fire	6	6
Bolt of Magma	5	5
Borgnjor's Revivification	6	0
Call Canine Familiar	3	0
Call Imp	2	0
Cause Fear	3	0
Chain Lightning	8	25
Condensation Shield	3	0
Confuse	3	0
Confusing Touch	1	0
Conjure Ball Lightning	6	20 or 25, on each explosion
Conjure Flame	3	2
Control Teleport	3	0
Control Undead	3	0
Controlled Blink	3 (at the destination)	0
Corona	1	0
Corpse Rot	2	0
Cure Poison	1	0
Darkness	3	0
Dazzling Spray	3	3
Death Channel	5	0
Death's Door	6	0
Deflect Missiles	3	0
Delayed Fireball	7	0 (15 at release time)
Discord	6	0
Disjunction	6	0
Dispel Undead	4	0
Dispersal	5	0
Dragon Form	6	0
Dragon's Call	7	15
Enslavement	3	0
Ensorcelled Hibernation	0	0
Excruciating Wounds	4	15
Fire Brand	2	0
Fire Storm	9	20 or 25 (depends on the radius)
Fireball	5	15
Flame Tongue	1	1
Flight	2	0
Force Lance	5	5
Forceful Dismissal	5	15
Freeze	1	0
Freezing Aura	2	0
Freezing Cloud	6	2
Fulminant Prism	4	0 (If it explodes: 15 for a weak explosion, 20 for a normal explosion)
Glaciate	9	25
Haste	5	0
Haunt	6	0
Ice Form	3	0
Ignite Poison	4	0
Inner Flame	3	0 (15 or 20 when the monster explodes, depends on the size of the monster)
Invisibility	0	0
Iron Shot	6	6
Iskenderun's Battlesphere	4	0
Iskenderun's Mystic Blast	4	4 (10 if there is a explosion)
Leda's Liquefaction	3	0
Lee's Rapid Deconstruction	4	15, 20 or 25 (depends on the radius of the explosion)
Lehudib's Crystal Spear	8	8
Lethal Infusion	2	0
Lightning Bolt	25	5
Magic Dart	1	1
Malign Gateway	6	10
Mass Confusion	5	0
Mephitic Cloud	3	15
Metabolic Englaciation	5	0
Monstrous Menagerie	5	0
Necromutation	6	0
Olgreb's Toxic Radiance	2	0
Orb of Destruction	7	7 (40 when two orbs collide)
Ozocubu's Armour	3	0
Ozocubu's Refrigeration	5	0
Pain	1	1
Passage of Golubria	3	0 (8 when the portal closes)
Passwall	0	0
Petrify	3	0
Phase Shift	4	0
Poison Arrow	6	6
Poison Weapon	2	0
Poisonous Cloud	6	2
Portal Projectile	3	see ranged combat noise
Recall	3	0
Regeneration	3	0
Repel Missiles	1	0
Ring of Flames	6	0
Sandblast	1	1, 2 or 3 (depends on the material: nothing, stones or large rocks)
Shadow Creatures	4	0
Shatter	7	30
Searing Ray	2	2
Shock	1	1
Shroud of Golubria	2	0
Silence	0	0
Simulacrum	6	0
Slow	2	0
Spellforged Servitor	7	0
Spider Form	3	0
Static Discharge	3	0
Statue Form	5	0
Sticks to Snakes	2	0
Sticky Flame	4	1
Sting	1	1
Stone Arrow	3	3
Stoneskin	2	0
Sublimation of Blood	2	0
Summon Butterflies	1	0
Summon Demon	4	0
Summon Elemental	3	0
Summon Forest	4	0
Summon Greater Demon	6	0
Summon Guardian Golem	3	0
Summon Horrible Things	6	0
Summon Hydra	6	0
Summon Ice Beast	3	0
Summon Lightning Spire	2	0
Summon Mana Viper	4	0
Summon Small Mammal	1	0
Sure Blade	2	0
Swiftness	1	0
Teleport Other	3	0
Throw Flame	2	2
Throw Frost	2	2
Throw Icicle	4	4
Tornado	7	~15 (depends on radius and delay of your last action)
Tukima's Dance	4	0
Vampiric Draining	3	0
Venom Bolt	5	5
Warp Weapon	4	0

Scale

This is from spl-cast.cc for reference:

• Silent: 0
• Almost silent: 1
• Quiet: 2
• A bit loud: 4
• Loud: 8
• Very loud: 15
• Extremely loud: 20
• Deafening: 30