Your example of using sound waves presents a conceptual problem to me. Your ether seems to be the closest one can come to a total vacuum. This is a real problem in the propagation of sound waves. They don't propagate in a vacuum at all. In common everyday speech, speed of sound refers to the speed of sound waves in air. However, the speed of sound varies from substance to substance: sound travels most slowly in gases; it travels faster in liquids; and faster still in solids. For example, (as noted above), sound travels at 343 m/s in air; it travels at 1,481 m/s in water (almost 4.3 times as fast as in air); and at 5,120 m/s in iron (almost 15 times as fast as in air). In an exceptionally stiff material such as diamond, sound travels at 12,000 metres per second (39,000 ft/s)—about 35 times as fast as in air—which is around the maximum speed that sound will travel under normal conditions. So if you are proposing that the ether is a near vacuum, sound waves won't travel anywhere or produce harmonics, let alone produce "lift" in massive objects. How does your ether deal with "gravitational waves"?