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1 user currently in Rom Hacking:  hukka |
| Acmlm's Board - I2 Archive - Rom Hacking - Sound hacking in Super Metroid |
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DukeNukem007 Shyguy Level: 13 Posts: 48/90 EXP: 9247 For next: 1020 Since: 07-08-05 From: Quahog, RI Since last post: 18 days Last activity: 12 hours |
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| Yes, another hacking thread on this great game, I know. I know that basically all of the sounds and (I think) music data are stored in the last 17 LoRom banks (278200-300200.) It also seems that the first several sounds, which include shooting, charging, energy pickup, etc. are hardwired to the SPC on boot. Anyone know why there are LOTS of dummied sounds in the data? It seems like some of the instruments and "Metroid shrieks" appear 3 or 4 times. My only guess is that the game might load music largely by bank rather than pull sounds from various different banks. Anyway, where this is all coming from is that I thought it might be interesting to replace the dummied sounds with higher-quality or different mixes for other sounds, or use it for extra map or graphics data, but I'm not sure if the game could handle it. The sound is already very good for a mid-generation SNES game, and there's an enormous sheer amount of sound data for any SNES game, but it would be interesting to experiment with. And if anyone else knows how to actually hack the music data that would be cool--I've crashed the ROM when I've tried hacking data in that segment, so I don't know if it's other program data or what. I know that the Screwed and Chopped hack was supposed to have different music in the final version. (edited by DukeNukem007 on 08-09-05 03:57 PM) (edited by DukeNukem007 on 08-09-05 03:58 PM) |
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MathOnNapkins Math n' Hacks Level: 67  Posts: 2112/2189 EXP: 2495887 For next: 96985 Since: 03-18-04 From: Base Tourian Since last post: 1 hour Last activity: 32 min. |
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| I was trying to hack the sound a month ago, to see how tracks were handled. (This isn't an N-SPC game, is it?) I didn't get too far, but I noticed that the game generally keeps the item room (boop beep) music in SPC ram, it keeps the main track being played in your area in SPC ram, and things like the Samus theme that plays when you actually get an item, etc... it doesn't seem to keep multiple musical tracks in memory at the same time. Like, i couldn't find a way to write to a location and switch from Brinstar music to Norfair music. Puzzling, but then again I need to learn more about the SPC to learn what's going on. |
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