For my midterm, I want to build a device that could read some special pattern and play the music.

First, I’m going to use brass tube to build a percussion instrument. After search online, here is the formula to calculate the length:

Length= 4*Speed/frequency   (For closed tube)

And refer the relationship between frequency and music pitch to calculate the length of tubes I need.

Here is the brass tube I cut.


Next step is to build box for tubes and servos. I am going to use servos to hit each tube.



Second, I need to find a pattern that could be read and transformed into specific pitchs. (Still not sure if I have enough time to finish this part.)

Here is the possible solutions:

  1. I might use several light sensors to sense black line on paper.
  2. I could use camera to analysis pattern or color on black or white paper.

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