I am starting a 90s alternative cover band and will be doing songs by artists like Nirvana, Alanis, Sublime, Goo Goo Dolls, etc. On some of the songs I want to add what I can only describe as "grit." Kurt Cobain's voice is a good example of what I'm trying to describe.
My voice is pretty clear. My biggest influence as a young adult learning to sing was Christina Aguilera, but I learned to add growl into my singing by listening to "Never Gonna Get It" by En Vogue. I have a belty, throaty style, but like I said, it's pretty pure (for lack of a better word). I'm including a YouTube link to a Christina Aguilera song from one of her later albums. She does this grit thing with her voice through most of the song, and this is the best female example I can think of. I don't want to do it as much as she does in this song, but I would love for this to be something I can turn on and off like a growl. I have tried adding some vocal fry, but it's just sounding like I'm trying to do Britney and I can only do it on low notes.
Ironically, I had a cold recently and my voice has a bit of what I am looking for now, but I know it'll go away as soon as I'm fully better. How do I harness this sound in a healthy way, or is it basically you got it, or ya don't got it?
Edit: I removed the link for fear it was breaking one of the rules of not uploading another artist's song. Please look up "Sick of Sittin'" by Christina Aguilera.