The Amazing Chan and the Chan Clan

I only saw these episodes in syndication and it only adds to the theory of how generic some of the animation in Hanna-Barbera cartoons were back in the 1970s. In another "Scooby-Doo" rip-off (even though it was based on Charlie Chan movies), "The Amazing Chan..." always had a mystery to solve where Chan's kids would figure out the mystery and Chan himself would add the finishing touches. But the most generic element of this cartoon (other than the tendency for the characters to pass the same scenery whenever they're running or riding in a car) was to see the kids play in the band. They were always moving the same way while different songs were playing (notice the two kids in the back playing horns and trumpets but you hear none of those instruments, as well as the girl playing the tambourines; same goes for the guy just tapping the drums and the lead singer just moving his/her lips, not matching any of the lyrics). Maybe kids weren't supposed to notice these things, but hey, I did.