What are the differences between the marimba, xylophone, and vibraphone in terms of their construction, sound production, and playing techniques?

The marimba, xylophone, and vibraphone are all percussion instruments, but they differ in construction, sound production, and playing techniques. The marimba has wooden bars with resonators underneath, producing a warm and mellow sound. The xylophone has wooden bars without resonators, creating a bright and sharp sound. The vibraphone has metal bars with motor-driven fans that create a vibrato effect, giving it a shimmering sound. Playing techniques vary, with the marimba using softer mallets for a melodic approach, the xylophone using harder mallets for a percussive sound, and the vibraphone using a pedal to control the vibrato effect.