How To Make SNES Sound Effects?

So, I've already gotten into the swing of ripping SNES instruments (Finally!), but what I've really wanted to do was create my own 16-bit SNES sound effects-specifically recordings of my own voice-however I don't know how to do so. I read somewhere that the creation of 16-bit sounds and instruments was done through a process called "bitcrushing"...but I don't know how to do that with modern-day technology.

Do any of you know how to make custom 16-bit sound effects?

P.S: the programs I currently have are Audacity and FL Studio 12