Barney Voices Through the Years (Thevideotour1's version)

1988-1989
This Barney lowest voice first appeared in "Our Friend, Barney" (April 26, 1988) and last appeared in "Barney's Basketball Fun" (June 25, 1989).

Late June 1989-August 1990
This Barney voice went up to +3. It first appeared in "Jason's Goes to Hosptial" (June 26, 1989) and last appearance in "Barney's Night Stay Up Late Party" (August 31, 1990).

Late 1990/1991-1992
Barney's voice becomes more higher to +2 (Pitch +5). It first appeared in "Barney's Imagination City" (September 1, 1990) and last appearance in "Barney's Happy Friendship Day!" (August 31, 1992).

Late 1992-1993
This Barney voice went up to 3 (Pitch +8). It first appeared in "Look Around the School" (September 1, 1992) and last appearance in "Love to Read, with Barney" (October 23, 1993).

Late 1993/1994-1997
This more gentle Barney voice used for this season first appeared in "Barney's A Trip to Imagination City (1993)" (October 24, 1993) and last appeared in "Barney's Magical Musical Mystery (1997)" (December 20, 1997). Thevideotour1 says that this would've been used in all Season 4 pilots, so it would be better for a Season 4 pilot video.

November 1997-2000
This Barney voice becomes more goofy. It first appeared in "First Day of School". It last appeared in "You Are Special".