The closing titles song includes the line "Every second that you see is 24 connected pieces". This implies 24 frames per second. However, although the show uses this as a baseline it is usually animated at a lower frame rate than this - every other frame or fewer. Furthermore, the show is presented via television, rather than projected from film, and the US (NTSC) frame rate is 29.97 frames per second. Therefore the song is a little misleading.