Blue has created a big band, and many of them, including Joe & the Viewers will be playing instruments in the band. They practice with Tickety and later listen to some music that Mr. Salt, Mrs. Pepper, Paprika & Cinnamon are creating simply by using an old washboard. They follow along to some of Periwinkle's beats as he plays on the drum. Later, they skidoo and meet Piano, who guides them through a musical story about a group of piglets.
Also, the guitar Blue made in that episode (along with Steve's red acoustic guitar) was seen next to the toy box.
Soft music plays when you feel sleepy. A sharp glissando sting would tell you to wake up. A marching tune would tell you to march. Fast paced music would tell you to run. If you can follow the rhythm, you'll know what body movement you have to do.