Project at RWTH Aachen: multi touch device

Touching knobs causes sounds of drum. Unfortunately there is no sound in video.



The next question would be: Can we build drum box to fit real the form and physical abilities of the hand (fingers), with knobs as in hang instrument?



  1. Precise blended surface
  2. Switch
  3. Bigger surface -> less noise
  4. Plastic battery holders

2 prototype2 switch

After some search

New music UIs:

Georg Linn’s Instrument:


Form press

Quality plays also important role in the UIs. So we designed a form press to make the acrylic blending  more precise.

As you can see, we have made precise cutting for camera ( I/O, led, screw holes) and batteries holders.
One of the main ideas in our prototype : “Keep design simple and durable”. DIA cycle.

Improve the prototype and add new features in each design step.

  1. Box, that is easy to build and to use, blended touch surface, camera holder
  2. Precise surface blending with form press, minimizing light noise problems
  3. Improving touch surface, more deep knobs and slider.
  4. Inclined touch surface

Theremin (termenvox):


Music Instruments as UI.

  • discrete input/output
  • continuous input/output
  • input/output resolution
  • touch feedback,
  • sound feedback,

Video of touch detection.

Limitations of the first prototype:

  1. Vertical Surface, difficult to use.  Solution: inclined surface.
  2. Tape, that connects LEDs to acrylic and acrylic to box, covers rather big part of the touch surface. Solution: bigger surface, another connection
  3. LEDs and the tape above the surface make to much noise.

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