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Research & Development Got a well-founded knack with ROM hacking? Love reverse-engineering the Pokémon games? Or perhaps you love your assembly language. This is the spot for polling and gathering your ideas, and then implementing them! Share your hypothesis, get ideas from others, and collaborate to create!
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  #1    
Old January 3rd, 2010, 12:39 PM
RedYoshi's Avatar
RedYoshi
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Introduction
I'm pretty sure someone else may have done this successfully, and that is changing the sound that an Instrument in a VoiceGroup makes. This is made possible by changing the pointers for the sounds through a hex editor. I've covered this in my tutorial on how to re-point cries. I've gotten the sound to change for some instruments, but there are many which I've had no luck with.


How I've Done It.
Quick Demo.



Well here's a brief explanation. By encoding a sound with PokeCryGui to an offset we can use the sound as an instrument for music by changing the pointers in a VoiceGroup.


These would be the pointers used for a Trumpet in a VoiceGroup
40 00 00 00 5C A5 48 08 E4 30 4A 08


Note: This could be flawed!
What I do is use this string to point to the sound I encoded with PokeCryGui, which is the same string used for cries.

20 3C 00 00 XX XX XX 08 FF 00 FF 00Where XX XX XX is the pointer in reverse hex.

This works for some instruments, but for some instruments this won't work. Some being the Timpani and the Strings. I haven't tried it out with Drums, but I am sure the above formula won't work because it uses multiple samples.



Goals
So what I need to find out are these things.
  1. A way to use it on instruments that use multiple samples.
  2. Figure out what the default Key (on a Piano that is) the encoded instrument uses.
  3. Make an instrument loop (like strings)
  4. Fix issues with how the sound comes out. Some samples come out distorted, it could be the string I use for replaced instruments.
Quote:
Originally Posted by Yoshi
Yoshi!
  #2    
Old January 14th, 2010, 01:45 PM
Esmas
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Join Date: Nov 2009
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This is interesting...I think this would be a great way to make a ROM hack seem "new," and an easy way to remix something, instead of inserting an entire new song.
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  #3    
Old January 25th, 2010, 06:34 PM
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Pkmn-Master
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Join Date: Jun 2005
Location: Michigan
Age: 20
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This isn't really that new...
http://www.youtube.com/watch?v=30vhRex0RKc
Charon the Ferryman figured how to do this about a year ago.
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