High priority means uninterruptible, except for the following sounds: In sound library 1, sounds 1 (power bomb explosion) and 2 (silence) can interrupt anything In sound library 2, sounds 71h (silence) and 7Eh (Mother Brain's cry - high pitch / Phantoon's dying cry) can interrupt anything In sound library 3, sound 1 (silence) can interrupt anything and 2 (low health beep) can interrupt anything except itself Sound library 1: { 1: Power bomb explosion 2: Silence 3: Missile 4: Super missile 5: Grapple start 6: Grappling 7: Grapple end 8: Charging beam 9: X-ray Ah: X-ray end (silence) Bh: Uncharged power beam Ch: Uncharged ice beam Dh: Uncharged wave beam Eh: Uncharged ice + wave beam Fh: Uncharged spazer beam 10h: Uncharged spazer + ice beam 11h: Uncharged spazer + ice + wave beam 12h: Uncharged spazer + wave beam 13h: Uncharged plasma beam 14h: Uncharged plasma + ice beam 15h: Uncharged plasma + ice + wave beam 16h: Uncharged plasma + wave beam 17h: Charged power beam 18h: Charged ice beam 19h: Charged wave beam 1Ah: Charged ice + wave beam 1Bh: Charged spazer beam 1Ch: Charged spazer + ice beam 1Dh: Charged spazer + ice + wave beam 1Eh: Charged spazer + wave beam 1Fh: Charged plasma beam / hyper beam 20h: Charged plasma + ice beam 21h: Charged plasma + ice + wave beam 22h: Charged plasma + wave beam / post-credits Samus shoots screen 23h: Ice SBA 24h: Ice SBA end 25h: Spazer SBA 26h: Spazer SBA end 27h: Plasma SBA 28h: Wave SBA 29h: Wave SBA end (silence) 2Ah: Selected save file 2Bh: (Empty) 2Ch: (Empty) 2Dh: (Empty) 2Eh: Saving 2Fh: Underwater space jump (without gravity suit) 30h: Resumed spin jump (called when spin/wall jumping from a water into an non-liquid room. Also called by unused code $84:8278) 31h: Spin jump 32h: Spin jump end (silence) 33h: Screw attack 34h: Screw attack end (silence) 35h: High priority. Samus damaged 36h: Scrolling map 37h: Moved cursor / toggle reserve mode 38h: Menu option selected 39h: Switch HUD item 3Ah: (Empty) 3Bh: Hexagon map -> square map transition 3Ch: Square map -> hexagon map transition 3Dh: Dud shot 3Eh: Space jump 3Fh: Unused. Resumed space jump(?) (Same as resumed spin jump, but space jump and spin jump loop the same audio) 40h: High priority. Mother Brain's rainbow beam (uses song-specific instrument 23h for channel 0) 41h: Resume charging beam 42h: Unused (uses song-specific instrument 24h) } Sound library 2: { 1: High priority. Collected small health drop 2: High priority. Collected big health drop 3: High priority. Collected missile drop 4: High priority. Collected super missile drop 5: High priority. Collected power bomb drop 6: Block destroyed by contact damage 7: (Super) missile hit wall 8: Bomb explosion 9: Enemy killed Ah: Block crumbled Bh: Enemy killed by contact damage Ch: Beam hit wall / torizo statue crumbles Dh: Splashed into water Eh: Splashed out of water Fh: Low pitched air bubbles 10h: Lava/acid damaging Samus 11h: High pitched air bubbles 12h: Lava bubbling 1 (uses song-specific instrument 22h) 13h: Lava bubbling 2 (uses song-specific instrument 22h) 14h: Lava bubbling 3 (uses song-specific instrument 22h) 15h: Maridia elevatube (silence, also uses song-specific instrument 25h) 16h: High priority. Fake Kraid cry (uses song-specific instrument 25h) 17h: High priority. Morph ball eye's ray 18h: Beacon (e.g. pre-Tourian hall) 19h: Tourian statue unlocking particle 1Ah: n00b tube shattering (uses song-specific instrument 25h) 1Bh: Spike platform stops / tatori hits wall 1Ch: High priority. Chozo grabs Samus 1Dh: Dachora cry 1Eh: High priority. Unused (uses song-specific instrument 25h for channel 1) 1Fh: High priority. Fune spits (uses song-specific instrument 25h) 20h: Shot fly 21h: Shot skree / wall/ninja space pirate 22h: Shot pipe bug / choot / Golden Torizo egg hatches 23h: Shot zero / sidehopper / zoomer 24h: Small explosion (enemy death) 25h: Big explosion (Ceres door explosion / Crocomire flailing / Crocomire's wall explodes / Draygon tail whip, also used by Mother Brain) 26h: Bomb Torizo explosive swipe 27h: High priority. Shot torizo 28h: Unused 29h: Mother Brain rising into phase 2 / Crocomire's wall explodes / Spore Spawn gets hard 2Ah: Unused 2Bh: Ridley's fireball hit surface / Crocomire post-death rumble / Phantoon exploding 2Ch: High priority. Shot Spore Spawn / Spore Spawn opens up (uses song-specific instrument 25h) 2Dh: High priority. Kraid's roar / Crocomire dying cry (uses song-specific instrument 25h) 2Eh: High priority. Kraid's dying cry (uses song-specific instrument 25h) 2Fh: Yapping maw 30h: Shot super-desgeega / Crocomire destroys wall (uses song-specific instrument 25h) 31h: Brinstar plant chewing 32h: Etecoon wall-jump (uses song-specific instrument 1Dh) 33h: Etecoon cry (uses song-specific instrument 1Dh) 34h: Cacatac spikes / Golden Torizo egg released 35h: High priority. Etecoon's theme (uses song-specific instrument 1Dh) 36h: Shot rio / squeept / dragon 37h: Refill/map station engaged 38h: Refill/map station disengaged 39h: Dachora speed booster 3Ah: Tatori spinning 3Bh: Dachora shinespark 3Ch: Dachora shinespark ended 3Dh: Dachora stored shinespark 3Eh: Shot owtch / viola / ripper / tripper / suspensor platform / yard / yapping maw / atomic 3Fh: Alcoon spit / fake Kraid lint / ninja pirate spin jump 40h: Unused 41h: (Empty) 42h: Boulder bounces 43h: Boulder explodes 44h: (Empty) 45h: Typewriter stroke - Ceres self destruct sequence 46h: High priority. Lavaquake 47h: Shot waver 48h: Torizo sonic boom 49h: Shot skultera / sciser / zoa 4Ah: Shot evir (uses song-specific instrument 24h) 4Bh: Chozo / torizo footsteps 4Ch: Ki-hunter spit / eye door acid spit / Draygon goop 4Dh: Gunship hover 4Eh: High priority. Ceres Ridley getaway 4Fh: Unused 50h: High priority. Metroid draining Samus / random metroid cry (uses song-specific instrument 24h) 51h: High priority. Shot coven (uses song-specific instrument 19h) 52h: Shitroid feels remorse (uses song-specific instrument 22h) 53h: Shot mini-Crocomire 54h: High priority. Unused. Shot Crocomire(?) (called by unused code $A4:889A) 55h: Shot beetom 56h: Acquired suit 57h: Shot door/gate with dud shot / shot reflec / shot oum 58h: Shot mochtroid / random metroid cry (uses song-specific instrument 24h) 59h: High priority. Ridley's roar (uses song-specific instrument 25h) 5Ah: Shot metroid / random metroid cry (uses song-specific instrument 24h) 5Bh: Skree launches attack 5Ch: Skree hits the ground 5Dh: Sidehopper jumped 5Eh: Sidehopper landed / fire arc part spawns / evir spit / alcoon spawns 5Fh: Shot holtz / desgeega / viola / alcoon / Botwoon 60h: Unused (uses song-specific instrument 25h) 61h: Dragon / magdollite spit / fire pillar 62h: Unused 63h: Mother Brain's death beam (uses song-specific instrument 18h for channel 1) 64h: Holtz cry 65h: Rio cry 66h: Shot ki-hunter / shot walking space pirate / space pirate attack 67h: Space pirate / Mother Brain / torizo / work robot laser 68h: Work robot (uses song-specific instrument 1Bh) 69h: Shot Shaktool 6Ah: Shot powamp 6Bh: Unused 6Ch: Kago bug 6Dh: Ceres tiles falling from ceiling 6Eh: High priority. Shot Mother Brain phase 1 (uses song-specific instrument 23h) 6Fh: High priority. Mother Brain's cry - low pitch (uses song-specific instruments 24h/25h) 70h: Yard bounce (uses song-specific instrument 1Ah) 71h: Silence 72h: High priority. Shitroid's cry (uses song-specific instrument 24h) 73h: High priority. Phantoon's cry / Draygon's cry (uses song-specific instrument 25h) 74h: High priority. Crocomire's cry (uses song-specific instrument 25h/26h) 75h: High priority. Crocomire's skeleton collapses 76h: Quake (Crocomire moves / Kraid moves / Ridley's tail hits floor) 77h: High priority. Crocomire melting cry (uses song-specific instrument 25h/26h) 78h: Shitroid draining (uses song-specific instrument 24h) 79h: Phantoon appears 1 (uses song-specific instrument 26h) 7Ah: Phantoon appears 2 (uses song-specific instrument 26h) 7Bh: Phantoon appears 3 (uses song-specific instrument 26h) 7Ch: High priority. Botwoon spit (uses song-specific instrument 24h) 7Dh: High priority. Shitroid feels guilty (uses song-specific instrument 22h) 7Eh: High priority. Mother Brain's cry - high pitch / Phantoon's dying cry (uses song-specific instrument 25h) 7Fh: Mother Brain charging her rainbow (uses song-specific instrument 24h) } Sound library 3: { 1: Silence 2: Low health beep 3: Speed booster 4: Samus landed hard 5: Samus landed / wall-jumped 6: Samus' footsteps 7: High priority. Door opened 8: High priority. Door closed 9: Missile door shot with missile / shot zebetite Ah: High priority. Enemy frozen Bh: Elevator Ch: Stored shinespark Dh: Typewriter stroke - intro Eh: High priority. Gate opening/closing Fh: Shinespark 10h: Shinespark ended 11h: (shorter version of shinespark ended) 12h: High priority. (Empty) 13h: Mother Brain's / torizo's projectile hits surface / Shitroid exploding / Mother Brain exploding 14h: High priority. Gunship elevator activated 15h: High priority. Gunship elevator deactivated 16h: Unused. Crunchy footstep that's supposed to play when Mother Brain is being attacked by Shitroid (but doesn't, see $A9:9599) 17h: Mother Brain's blue rings 18h: (Empty) 19h: High priority. Shitroid dies (uses song-specific instrument 25h) 1Ah: (Empty) 1Bh: High priority. Draygon dying cry (uses song-specific instrument 25h) 1Ch: Crocomire spit 1Dh: Phantoon's flame 1Eh: Kraid's earthquake 1Fh: Kraid fires lint 20h: High priority. (Empty) 21h: High priority. Ridley whips its tail 22h: Crocomire acid damage 23h: Baby metroid cry 1 (uses song-specific instrument 25h) 24h: High priority. Baby metroid cry - Ceres (uses song-specific instrument 24h) 25h: Silence (clear speed booster / elevator sound) 26h: Baby metroid cry 2 (uses song-specific instrument 25h) 27h: Baby metroid cry 3 (uses song-specific instrument 25h) 28h: Phantoon materialises attack 29h: Phantoon's super missiled attack 2Ah: Pause menu ambient beep 2Bh: Resume speed booster / shinespark 2Ch: High priority. Ceres door opening 2Dh: Gaining/losing incremental health 2Eh: High priority. Mother Brain's glass shattering (uses song-specific instrument 25h for channel 1) 2Fh: (Empty) }