Another possible option to get examples of your voice reading Sci-Fi would be to read a book or story for Librivox. In case you haven't heard of it yet, they accept volunteers to read books in the public domain:
1. Go to Project Gutenberg's Sci-Fi bookshelf and pick a public domain book or story: http://www.gutenberg.org/wiki/Science_Fiction_%28Bookshelf%29
2. Post on the forum at www.librivox.org, introducing yourself and stating what you're intending to read.
*shameless OT plug*
Absolutely. We can always use more readers.
However...
The better way is probably to ease into it by starting with a few smaller projects, like a couple of chapters in a collaborative reading of a novel (pick one from
http://librivox.org/forum/viewforum.php?f=2 ), or some poetry for a collection or other shorter work (
http://librivox.org/forum/viewforum.php?f=19 ).
If you're into listening, they've got some H.G. Wells, H. Beam Piper, and H.P. Lovecraft, as well as one Philip Jose Farmer novel and one Lester Del Ray novel.
Also three (two novels, one short story) by Andre Norton, two of Burrough's Barsoom novels, two by Lord Dunsany, Henry James'
Turn of the Screw, Alan E. Nourse's
Star Surgeon, Mary Shelly's
Frankenstein, Bram Stoker's
Dracula, seven by Jules Verne, and
The Romance of Rubber by the United States Rubber Company.
Well, okay, maybe the last one is not the most popular one, and not much to do with SF/Fantasy/Horror.
Some time this Fall, I'll probably have finished my first solo project, Harry Harrison's "Planet of the Damned" -
http://librivox.org/forum/viewtopic.php?t=9218We're not all that fussy. See "What if I Suck?"
http://librivox.org/forum/viewtopic.php?t=37We're not all that professional either. See "Bloopers"
http://librivox.org/forum/viewtopic.php?t=3020