I've been trying to get the gravel or rasp of my voice record for years.
I can hear it when recording but on playback it's always gone.
I can fudge it with plugins but I can never record it.
 
The setup:  Avantone CV 12  > Art Pro Channel  > Mackie VLZ 1604 pro > Tascam Us1200.
Playback: Tascam us1200 > headphone at this point with or with out Sonarworks Ref3
 
Thankyou!

Shot of cheap whiskey and/or a cigar right before recording vocal tracks.  I'm not joking.  
 
And the cigar will also loosen the muscles in your throat to help with lower-range.  My teacher, who was also a pro opera singer, told me that's what the 3 tenors did for their bottom end.
 
The growl is probably subtle enough when recording that you THINK it's prevalent, but not quite.  For what it's worth, I have the same problem.  Mistreating my voice right before recording helps, but some of us just have to accept that we're not growlers.

Slugbaby
Shot of cheap whiskey and/or a cigar right before recording vocal tracks.  I'm not joking.  
 
And the cigar will also loosen the muscles in your throat to help with lower-range.  My teacher, who was also a pro opera singer, told me that's what the 3 tenors did for their bottom end.
 
The growl is probably subtle enough when recording that you THINK it's prevalent, but not quite.  For what it's worth, I have the same problem.  Mistreating my voice right before recording helps, but some of us just have to accept that we're not growlers.

but he's only 12 years old.....

try a Sure sm57 or cheaper mic...then try adding some saturation if you have it on prochannel

EQ EQ EQ
;-)

Hum, whisky? lol I don't really drink.  have a genetic rasp, its a family thing, maybe because my grand parents drank an smoke...
 
No not 12... older then dirt here...lol well unless you didn't mean me... ha.
 
Cheap mic? hum.... I have one of them sm57sw
 
EQ yea :( but it's not the same..
 
Thanks just the same.

Get closer to the mic, loosen the vocal chords, let the cheeks hang down and go a bit into talk-singing,
like the Man in Black did. He had a low, casual voice and he mostly kept in a low register and went a bit off-key as if he was struggling when singing higher.
 
But if it ain't there, it ain't there, I guess.
 

Experimentation with different mics, and mic techniques, is the only real way to learn how to capture your voice in the best way.
It's true that alcohol and cigarettes have been known to add to a vocalists sound. But also, time of day, how tired you are, your emotional state etc., etc., can all change how your voice sounds.
It's a known psychoacoustic effect, that we hear our own voices deeper, and with more timbre, than they sound in the "real" world. There is not a singer in the world who has not been surprised when they hear their voice recorded for the first time. It has something to do with hearing the vibrations of the bones and muscles in our body when we make sounds. Ask a trusted colleague how close your recorded vocals are to what your voice sounds like from their point of view.
Or, have your voice recorded in a few different studios. Tell the engineer what you are trying to achieve and then make notes of their mic choices and settings. Any engineer worth their salt will be only too glad to help you achieve your goal.

Have you tried using some Saturation ?
Softubes Sat module in the PC is perfect in cases like this.

11Dreams
Hum, whisky? lol I don't really drink.  have a genetic rasp, its a family thing, maybe because my grand parents drank an smoke...
 

Are you sure? I mean I have no doubt that you can hear it. But everyone's voice sounds different in their own head than it does to anyone else. Vibrations of the skull and all that. Are you able to record your voice into things other than Sonar and hear the rasp?