SPC topic

Could someone explain to me what exactly does the Vibrato (C9 XX XX XX) and the Tremolo (CB XX XX XX). I know how to use the commands it's just that I don't know what they do exactly and before experimenting I would like to know.

Edit: Also, which program do you use to export a spc composition from the ROM in spc format to be able to listen it in a spc player?

Thanks

Vibrato is sort of like an oscillation of the note back and forth. These links might help you understand both vibrato and tremolo.

As for dumping an SPC sequence from a ROM to an .SPC file to listen to both ZSNES and SNES9x have this capability. Frankly, SNES9x is vastly superior when dealing with SPC sequences compared to ZSNES. In SNES9x right before the song plays--after the current song stops--go File -> Save Other -> Save SPC data. That will dump the next SPC sequence played into an .SPC file and it will be located in the SPC folder where SNES9x is stored on your computer.

@ JCE: I've always wondered if there is a way to replace/import custom sound effects to the ROM, is there a way to do that?

Yes and no. If the sound effect is stored via a BRR waveform sample then yes, absolutely. If the sound effect is generated with the game's SPC core waveform generator, for example like Kefka's laugh, then no. You'd have to re-engineer the waveform generator to generate the sound effect itself. Or just replace another less used or easily replaceable BRR sample with the desired waveform. Games like FF4 has mostly waveform generated sound effects, so replacing them takes quite some doing. Where as games like Street Fighter 2 use a bunch of BRR compressed waveforms and could theoretically be replaced quite easily once you locate both the BRR pointer and BRR data itself.

Here's some examples of my early attempts importing BRR's from one game to another. This of course doesn't cover replacing them with .WAV files...but you can get the idea of the application.

Offtopic slightly, if I could only of matched the frequency better Mystic Quest's distortion guitar is FAR superior to any in video game history.