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 Forum index » DIY Hardware and Software » Developers' Corner
ControlExplorer - multiple mice => OSC
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Antimon



Joined: Jan 18, 2005
Posts: 3619
Location: Sweden
Audio files: 254
G2 patch files: 95

PostPosted: Sat Oct 25, 2008 8:55 am    Post subject: ControlExplorer - multiple mice => OSC Reply with quote  Mark this post and the followings unread

http://www.df.lth.se/~flash/ControlExplorer%20example.mov

Here's a movie of a little application I've made. What I've done is that I've hooked up four mice (or rather, three trackballs and my MacBook touchpad). Then I read their respective position in a ChucK app, send the data to a Java application that displays the GUI you see in the movie. Besides showing the randomized bubble maps, the Java app sends OSC messages with values that correspond to the bars you see at the bottom of each subwindow. These values are calculated depending on how close to the center of bubbles of the respective colour the center crosshair is.

It's a bit messy to explain, hopefully easier to understand by watching the movie. I'm going to put up the source code here as well, but I have a hunch from past projects that people aren't always keen on downloading apps spread over multiple programming environments and trying to get them to work.

Anyway, I'm curious if anyone likes this idea, and maybe have ideas of their own. Ever since I learned about the id field in the mouse HID object in ChucK, I've been obsessing about how cool this ought to be if you get a couple of trackballs and start to mess about. I'm think about ordering a pile of cheap Kensington trackballs for a more extensive project.

/Stefan


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Antimon



Joined: Jan 18, 2005
Posts: 3619
Location: Sweden
Audio files: 254
G2 patch files: 95

PostPosted: Sun Oct 26, 2008 4:45 am    Post subject: Reply with quote  Mark this post and the followings unread

OK, here's an example with sound (worse picture quality though - I'll have to check up on how to use iMovie or some other way of combining video with sound).

http://www.df.lth.se/~flash/ControlExplorer%20example2%20w%20sound.mov

So, I made a Nord Modular G2 performance with one slot for each subwindow, controlled via an OSC to MIDI conversion thingie written in ChucK.

Top Left: Magenta is a low rumble, yellow is a saw drone and cyan is a harp-like arpeggio going up and down.

Top Right: A bass thingie, the different colours control variuos FM and filter stuff.

Bottom Left: Drums. The colours change the patterns for kick, rim and snare respectively, a hihat sound is controlled by all combined.

Bottom right: a slow loop of five notes on a fm/ring modulator thingie.

All of these are patched so that if any of the three control values are above zero, the sound fades in to full volume. Then the values (who depend on how close to the center of a circle you are) control filter frequencies, FM magnitudes etc to change timbres and stuff - except the drums where the just control the trigging sequences. I'm attaching the G2 patch I used to make the sounds. I mostly have put three constant level modules that are controlled by the MIDI parameters 29, 30 and 31 that I send from my OS to MIDI converter.

/Stefan


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DrJustice



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PostPosted: Sun Oct 26, 2008 10:07 am    Post subject: Reply with quote  Mark this post and the followings unread

Trackballs are indeed cool. I've been thinking about using some in the past. The idea was to use a microcontroller to decode a few of them. I suppose one can only get USB trackballs these days, which makes the microcontroller route a bit of a hassle compared to using the HID services in desktop OS'es.

Not only can trackballs be used to set values, rotary style, but due to the endless rotary nature they could be used for 'scratching', or advancing time/position in any kind of data set, which I guess is what you are doing here. Unfortunately I can't test the setup you posted, but the video is a nice enough showcase Smile

DJ
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