next up previous
Next: Running TrikTraks Up: How to create and Previous: How to create and

Creating the datafile

First, create a datafile with the following information. You don't need to type the hash mark (#) or anything that follows it on a line. That's just a comment.

Use your favorite word processor. Type in all the information below, and then save it as a file called data. Be sure to save the resulting file as a plain text file. (Some word processors call this a ``DOS file''.) Remember to save the file in the same directory where your TrikTraks program resides.

Here's the datafile to generate a 5-second sound.

     output(sound.wav)    # name of the output soundfile
     duration(5)          # duration of the transformation in seconds
     
     20                   # element 0: duration in samples
     1000                 # amplitude
     
     30                   # element 1: duration in samples
     -10000               # amplitude
     
     40                   # element 2: duration in samples
     10000                # amplitude
     
     10                   # element 3: duration in samples
     -500                 # amplitude

The first line has the command output(). This tells TrikTraks to call your output soundfile ``sound.wav''. (It's a custom on Intel computers to give soundfiles the extension ``.wav''.)

The second line has the command duration(). This tells TrikTraks how long you want the transformation to be, in seconds.

The following lines define the elements that make up your waveform. There are four elements defined in this datafile. The first line of each pair specifies the duration in samples of the element, and the second line specifies its amplitude.

These elements create a waveform that looks like this:

\scalebox {0.6}{\includegraphics*{graphics/wave1.eps}}

next up previous
Next: Running TrikTraks Up: How to create and Previous: How to create and
Arun Chandra
arunc@evergreen.edu