Video of me testing out recording videos on the gamecube/wii Dolphin emulator, and also demonstrating some Wiird sound codes that I made. I'm not yet aware if anything such has been made before, but I'll post the codes anyway(PAL version only):

Pitch Modifier[ConkerGuru]
045A5278 ???????? - Default: 47800000
NES-Esque Sfx Echo Modifier[ConkerGuru]
045A5310 ???????? - Default: 40A00000
NES-Esque Sfx Speed Modifier[ConkerGuru]
045A5398 ???????? - Default: 476A6000
NES-Esque Sfx Pitch Modifier[ConkerGuru]
045A53A0 ???????? - Default: 3F800000
045A53A8 ???????? - Default: 42FE0000
Note: If the value of line 1 is set lower, the 2nd line has to be adjusted accordingly(as the volume of the NES-esque sound effects will lower or raise). Applies vice versa by setting it higher.

Values used in the video:
Code 1: 47BA0000
Code 2: 42700000
Code 3: 472A6000
Code 4: 3F1FC000 42BC0000