The Word Showcase film segments

[YellowYahooey]

Does anybody know who provided the voiceovers for the Word Showcase film segments? I know a female provided the voiceover for the "M" segment. The same male voiceover was used consistently for "D, a delightful letter", "G, a great letter", and "T, a terrific letter". Another male voiceover was used for the "R" segment, and I might think the "N" and "O" segments used a different but consistent voiceover, which also used a walking "N" wearing a hat, or a mouth forming an "O". A child voiceover was used for the "Cold things beginning with I" segment. Who were the voices behind these segments?