Concept 1
My research indicated that playing music on a theremin is basically adjusting the distance between the performers hand and the antenna, to generate the melody the performer wished to play. In order to allow the performer to play a piece of composition consistently and accurately, there should be some visual reference to help the performers while they move their hands around. For example we can build a meter that tells the performer what kind of distance between their hand and an antenna generate what kind of sound. And we can either made a physical representation of the meter or we can use the Holographic Laser Projection technology to project the meter in front of the performer so they can use the reference while playing.
Concept 2
Another idea is to increase the range of which theremin can recognize the performers movement, which means the performer can move there hands within a larger range. And the theremin will be less sensitive to the movement of the hand, that is saying performer need to move a relatively longer distance to change the tone, this will make it easier for the performer to play a piece of composition accurately and consistently.
Comparison
To compare the prototypes, which are the implementation of the above concepts, we can use the Pugh Matrix. We can use the laser harp model in the example video as the baseline.
Accuracy
The easiness for the performer to consistently play the key he or she want.
Practicability
Does the movement needed for playing the composition easy to achieve and can be done consistently.
Reliability of the system
Weather the system can be used to play compositions consistently without having problems.
Complexity
Weather the system is very complicated that hard to learn how to use it to play, and play consistently.
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