Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to make a theremin [title] Learn the essential components of the theremin. [step] A theremin is basically a box with two antennas, one of which controls the pitch of the instrument, the other of which controls the volume. These antennas create electromagnetic fields which are " played " by manipulating them with the hands.

Ending1: They are tuned and manipulated using the head and antenna of your instrument. [substeps] The operation of this type of theremin is complicated. Ending2: The theremin usually goes in a box, so this is where the crankoperators come in handy. [substeps] The theremin is designed to perform various tasks on your instrument, such as transferring notes from string to a circle. Ending3: Coils of tight-pack wire act as oscillators, producing signals fed into the antennae. While it may seem like spooky magic, the fields are created by relatively straightforward circuitry. Ending4: Depending on the instrument size and equipment, each would produce a different pitch. [substeps] For a theremin you may want to order a set of around.

Answer format: ending1/ending2/ending3/ending4