Well, I got rid of some of the sound effects through simple hex editing of the SDAT and reinserting it with Nitro Explorer. I can get rid of more, but the simple typing effects are gone. The latest OST rip I have seen still has some sound effects in it and has some splicing from the GBA version to fill in sound effects. Essentially, not perfect. So if anyone is interested in a sound effect ripped copy of Phoenix Wright 3, then say something. Tell me what sound effects need to be destroyed with fire, as I've only ripped the basic typing noises out. I'm lazy, so I'm not ripping them all.