Making a Basic Selection

This procedure shows how to make a selection in a time-frequency representation using basic, simple selection tools.

To Make a Basic Selection:

  1. Open or calculate a time frequency representation.
  2. From the toolbar, click a selection tool:

    • Rectangular selection to select a rectangular time frequency component.

    • Line selection and then,

      1. Enter a value in the Current tool settings panel to specify the width in Hertz for the linear selection.

      2. Click and drag the mouse in the time-frequency representation to select a linear time frequency component.

    • Freehand selection to select an area in the time frequency representation.

    • Magic wand and then,

      1. Enter a value in the Current tool settings panel to specify the tolerance in dB for the magic selection.

      2. Click a point in the time-frequency representation to automatically select a related area around the clicked point.

        Note: The selected area is extended to all the surrounding points that are in a range of amplitude of +/- X dB around the amplitude of the original clicked point (where X is a tolerance value set by the user, in a dedicated floating window).

    • Slice management then click and drag the time-frequency representation to select a part at a required time and on the whole frequency bands.

  3. If you want to adjust the selection, from the toolbar, click:

    • Click Enlarge selection to enlarge the current selection.

    • Click Reduce selection to reduce the current selection.

    • Click Clear selection to clear the current selection.

The selection is done.

Tip: Now, you can save the selection.