I heard that interview sometime in the last year, linked from a Toughpigs thread. I did notice he sounded a bit like the Alphabeat he did.It’s been easier to catch Moss’ voice with more clips that show his voice outside of singing bass (and there’s also an interview of him speaking somewhere archived on here).
I remember back when I didn't have much access to Little Jerry and the Monotones, I assumed that was Richard Hunt doing Big Jeffie's lines in With Every Beat of My Heart (I wasn't too familiar with Jeff Moss's voices at that point). Then I learned which one was Big Jeffie and then saw Telephone Rock, where his voice is Jerry Nelson, and I thought I knew better - I thought it sounded like the one singing on the aforementioned track even though it wasn't his usual voice (while also feeling it sounded a hint like Jerry Nelson - I guess with what I knew, my assumption that they were actually always consistent with their voices, and Little Jerry being performed by Jerry Nelson, I figured it couldn't have been him) in addition to hearing the high-pitched Richard Hunt voice with the next member.
Jeff Moss, Richard Hunt, and Christopher Cerf were usually heard in their songs, but it was rare for all three to actually be in a Little Jerry song (I recently watched Body Rhythms because I could not remember if they were all in it.... I think Nelson did Big Jeffie again, I can't really tell who did the sleeping guy or the extra member). Clearly when they did Four they chose to name them after whoever was voicing them then, I wonder if they consciously chose to have those vocals for that song or if they went with whoever they could get (I hope what I'm asking is worded right) and then named them accordingly. It could have been different if they happened to include Jim Henson or Frank Oz or Joe Raposo in the studio to record that song.
It's odd that in Four, when introducing members, Little Jerry refers to Big Jeffie as "the last, and least", when he seems to be second in command, being the one most likely to get his own vocals in their songs. Though Proud makes them a little more equal, being one of the only ones where all four members gets a line (and Chrissy actually gets two lines over Big Jeffie's one there).