1. Download and install the drum machine or sequencer for your OS
  2. Make sure you have a camera plugged to your computer (webcam, or DV camera should also do)
  3. If it is the first time you use the system, a dialog box will appear asking you to log in.
  4. In the login dialog enter username and password (you need to create an account on the registration page) and click on the activate button
  5. The d-touch application will now launch; on OS X a configuration dialogue for the camera will pop up, please select the appropriate options or leave the defaults, and click on OK
  6. If necessary or appropriate, you can configure various parameters related to the audio card and the webcam by opening the preferences dialog
  7. Adjust the camera and board positions to make sure that all the markers in the corners are in view
  8. Fix the board to the table using some tape, if possible
  9. Adjust the camera focus and the light in the room so that the four calibration markers at the corners of the board are recognized and highlighted. It is best if they are stable, but it can be ok if they blink a little
  10. The d-touch application will give feedback if the calibration markers aren't visible.
    What are calibration markers? They're the rectangular shapes in the 4 corners of the board, they help d-touch workout the correct position of blocks on the interface.
  11. Follow the onscreen instructions until the d-touch application is properly calibrated.
    This could involve positioning the board correctly; Toggling a debug display which helps you to understand how lighting can affect marker recognition; Or perhaps toggling blur will help d-touch recognise markers by reducing the noise or graininess some webcams produce.
  12. If you aren't using the on-screen visualiser, close the visualiser window (the one showing the board). If you are, then drag the window containing the board on to your external screen’s display. Once you have done this, try and resize the window so that it is roughly the size of an A4 page. You can use an A4 sheet of paper to do this or just guess, it only needs to be rough. Now, move the window and the camera around until the entire window can be seen by the camera (you can use the “DTServer” window to help with this).
  13. Place some blocks on the board and check that they are recognized and highlighted. It is best if they are stable, but it can be ok if they blink a little. If the system isn't working well enough, try some of the following:
    • Adjust the focus of the camera (if it is not an auto-focus camera) so that the markers appear sharper.
    • (If using on-screen visualiser) Try adjusting the brightness and contrast of the screen until the markers are detected. The system works best if the brightness of the screen roughly matches that of the surroundings, although this shouldn’t be necessary for the system to work well.
    • Try making the surroundings brighter by turning on some more lights or opening curtains.
    • Try toggling the “Blur” and “Screen mode” buttons to see if this makes the markers easier to detect. They should both be on by default.
    • Try placing the camera in a more central position over the screen.
    • (If using on-screen visualiser) Try making the board smaller by resizing the window and then move the camera closer to the screen.
  14. Enjoy using your new tangible interface application!
  15. Share videos or pictures of your d-touch drum machine or sequencer setup on our community page