The premise of tracking is that any given sound sample can be played back at a speed in KHz different than or equal to the speed in KHz at which it was recorded. If I record a sample of someone tapping the middle-C key on a piano at 16KHz, and then play it back at 15KHz, you will get a note which is lower than middle-C. If I play it back at 17KHz, you will get a note which is higher than middle-C.

To compose a musical work in a tracker, one first gathers all the sampled instruments one wishes to use for that particular composition. Then, notes are entered into patterns. A pattern is a set of rows - usually 16, 32, or 64 rows - which contain musical notes. You might create one pattern with an opening stanza, another with a certain musical phrase, etc.

A pattern may look like this (rather simplistic) example:

 ___________________________________________
|    1     |    2     |    3     |    4     |
|__________|__________|__________|__________|
|C-4 01 V80|C-3 02 V70|... .. ...|... .. ...|
|D#4 .. ...|C-3 .. ...|... .. ...|... .. ...|
|C-5 .. ...|C-3 .. ...|... .. ...|... .. ...|
|... .. V40|C-3 .. ...|... .. ...|... .. ...|
|C-5 .. V80|C-3 .. ...|... .. ...|... .. ...|
|... .. V40|C-3 .. ...|... .. ...|... .. ...|
|A#4 .. V80|C-3 .. ...|... .. ...|... .. ...|
|C-5 .. ...|C-3 .. ...|... .. ...|... .. ...|
|... .. V40|C-3 .. ...|... .. ...|... .. ...|
|G-4 .. V80|C-3 .. ...|... .. ...|... .. ...|
|A#4 .. ...|C-3 .. ...|... .. ...|... .. ...|
|... .. V40|C-3 .. ...|... .. ...|... .. ...|
|F-4 .. V80|C-3 .. ...|... .. ...|... .. ...|
|... .. V40|C-3 .. ...|... .. ...|... .. ...|
|D#4 .. V80|C-3 .. ...|... .. ...|... .. ...|
|... .. ...|C-3 .. ...|... .. ...|... .. ...|
|__________|__________|__________|__________|

In this example, which I have taken from an actual song I've composed, we have four channels allocated in this pattern. We're currently only using two. Each channel has space for a note (first column), a sample number (second column), and an effect (third column). In the first channel, I am playing a melody. I am playing the note C-4 with instrument 01 with effect V80. (That means set the volume to 80, which is maximum. Other effects might allow me to slide the note up or down at a certain speed, set the duration the note will be played, add a flange effect, or whatever else the tracker supports.) On the next row, I'm playing the note D#4. I'm not specifying an instrument or an effect; the tracker will simply assume I haven't changed my mind from the previous row and use the data there. I might only specify the sample and volume once in an entire song; the tracker will use these values all the way through.

In the second channel I'm playing a simple baseline with instrument 02 at volume 70.

When I've got all my patterns done, I can set them up in the pattern list, thus:

|001|
|002|
|001|
|002|
|003|
|004|
|003|
|004|
|005|

This will play pattern 1, then 2, then 1 again, then 2 again, then 3, 4, 3, 4, and finally 5.

Patterns are then played back in the order you specify to create the song. One pattern may be played back multiple times. This is especially useful for drums and baselines, which are often repetitive; you only have to create the pattern once, but you can play it back as many times as necessary.

Tracking is a skydiving maneuver in free fall that lets you attain great horizontal speed.

By dearching, bending a little at the waist, tightening the buttocks, stretching the feet out horizontally and using the hands (positioned alongside your body) as stabilizers, you have one well hell of track, reaching speeds of up to 150 miles an hour horizontal speed. The knees must be straight, the toes pointed and both should push down onto the relative wind, as should the arms. "A slightly spread position, with feet almost shoulder width and hands 6"-12" from the toso is better because it aids in stability and makes it easier to deflect more relative wind." (Taken From John Le Blancs Notes On Canopy Control And Freefall Skills). Steering is simply a matter of moving the shoulders and head in your desired direction of travel. By simply whipping an arm across the front of the body, the skydiver goes into an immediate barrel roll, which is only stopped by replacing the arm by the side.

The Tracking is something that can be wrong with your car.

Essentially, it refers to the alignment of the four wheels with respect to each other. There are two main ways it's adjusted.

  • Toe - This is the alignment of the tyres. Sometimes, the tyres should be "toe in" - this means that the two front tyres point inwards, and sometimes they should be "toe out" - they point outwards. And sometimes they should be neutral. The vehicle manufacturer specifies what they should be set to, and how much.
  • Camber - This is the angle of the tyres with respect to the road. Again, this is specified by the manufacturer.

Usually, the toe only applies to the front wheels, but camber applies to all four. Adjusting the tracking is done at a service centre where they use a special set up that involves hooking units onto each wheel that project light markers to the other tyres. The wheels can then be adjusted.

Tracking is most often set off after hitting a curb or a large pothole. If you leave it off, the car can handle badly, and you will also get uneven wear on your tyres.

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