Thread:Toadette-IAD/@comment-12684213-20160710193817/@comment-27696258-20160710200154

If you listen closely, the whistle zips are indeed lower-pitched compared to what they should be. This was a result of Jones using Sam Horta as his sound editor on several of his cartoons from the 1970s; the problem of lower-pitched Hanna-Barbera SFX can also be heard in Filmation's cartoons from the same time (including the infamous Daffy and Porky Meet the Groovie Goolies special), since they also used Sam Horta for SFX editing.