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MultiKey Updates…it works with a mouse too!

No, I haven’t forgotten about the other programs that I first started on. I’m still developing Audioshape Sequencer as well as Musical Squares, but recently I have made some big changes/additions to the MuliKey application. I think all of the changes are great improvements and will allows for much more functionality and experimentation within a simple application like MultiKey.

First, if you’ve seen the first versions, you’ll notice that the look has changed slightly. I’ve gotten rid of the background (for now) to allow for best performance. Also the border of the keyboard has changed a bit so that it is easier to resize the keyboard. Previously the border width made it somewhat hard to select the keyboard for moving,

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New application: Audioshape Sequencer

Audioshape Sequencer is modeled after Tangible Sequencer and originally inspired by Nicolas Clavaud.This application works with a mouse and/or multitouch table (touchlib/tuio simulator or other TUIO program).

There are three main things to know about the program.

  1. There is the shape (square),
  2. signal (transparent orange shape),
  3. and sensor (Blue dot on square. Pink when activated).
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My first videos…

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Musical Squares update!

Well, I’ve made some additions, some changes and came up with an overall complete version of Musical Squares. Complete does not mean finished though, expect massive updates and much more functionality. This version is good enough to be called “Version 1” I would say.

In this version, I changed the 8 original notes to 5 notes (pentatonic scale) with 3 percussive tones. It sounds…well..interesting. I also added the ability to remove squares by dragging them outside the main stage and adding new squares by pressing on the colored squares on either side.

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Musical Squares…get it?

Well, Musical Squares isn’t anything like Musical Chairs, but it’s fun nonetheless. Who wouldn’t like throwing around objects that emit tones (sounds) when they hit each other?

I started working on this second music program as an aim to explore other musical possibilities. Right now there’s not too much functionality, and it’s a basic proof-of-concept as there isn’t much practical application for it yet. It’s based off another existing (single touch) online program called “Pianolina” that I hope to improve and build off of. The most recognized aspect between the original application and this one will be the multi-user, multi-touch aspect.

There is still a lot to be done to make things not so chaotic sounding. Currently, you can

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MultiKey – My first application

MultiKey is a simple multi-user, multi-touch music application. In the standard version, there are two music keyboards. One is a full octave, while the other is two full octaves. By pressing on the white border, the individual keyboard will switch into move/rotate/scale mode and can be rotated and resized to your liking. Press on the white border again, and move/rotate/scale will be turned off. Have fun!

MultiKey v1.3

Possible Future Changes/Additions/Bug Fixes:

-Ability to change to different sound library
-Ability to add (drag out) multiple keyboards. Idea: use a gesture that is assigned to keyboard creation.
-Add some kind of dynamic movement in background when key is pressed since keys are transparent.
-Fix canvas and create ZUI so pianos don’t

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FTIR or DI, my final multitouch decision…

After spending a large amount of time focusing on Diffused Illumination ( Rear DI), I’ve switched my concentration back to FTIR. I had great results with DI and was happy with the ease of use and setup, but one issue I had was the constant calibration I would have to go through every time I tested. This most likely had to do with an incomplete setup and open box where the IR light, shinning at the acrylic, would easily change as the environment changed. Although with some fixing it is possible to have a great DI setup, I’ve chosen to go with FTIR.

There are a couple main reasons for this decision:

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FTIR and DI. How they work and what they mean for multitouch.

FTIR and DI are the two main technologies used in NUIGroup (I will be posting information on alternative techniques at another time):

FTIR = Frustrated Total Internal Reflection (a phenomenon) – This is currently the most popular method, possibly due to the wide internet distribution of Jeff Han’s videos. IR light is shined into the side of an acrylic panel (most often by shinning IR LEDs on the sides of the acrylic). This light is trapped inside the acrylic by internal reflection. When a finger touches the acrylic surface this light is “frustrated” causing the light to scatter downwards where it is picked up by a IR camera.