249

Changing the zoom level

Zooming can be accomplished in several ways:

1.Drag on the graph to draw a box around the area you want to magnify. You can toggle through mouse selection mode by right-clicking while holding the left mouse button:

•The first type is a vertical zoom window. This will allow you to zoom to a frequency range.

•The second type is horizontal zoom window. This will allow you to zoom to an amplitude range.

•The third type is a combination of vertical and horizontal zoom. This will allow you to zoom to a frequency and amplitude range.

2.Right-click the graph and choose Zoom Out Full to view the entire amplitude and frequency range.

3.Right-click the graph and choose Normalize dB to set the Spectrum Graph amplitude range equal to the maximum and minimum values in the graph.

Working with stereo files

When viewing a spectrum graph for a stereo file, an individual graph displays for each channel. You can choose to set each channel’s parameters independently or set both channels at once.

1.Open a stereo file.

2.From the View menu, choose Spectrum Analysis. The Spectrum Analysis window appears, containing two unique graphs.

3.Click the Sync button () to synchronize both displays so you can view the same region of the FFT in both channels. When this option is disabled, you can set each channel’s attributes independently.

4.To see both channels in a single graph, click the down arrow next to the Normal Display button ( ) and choose Single Graph.

Updating a spectrum graph

Select the Auto Refresh button () if you want the Spectrum Analysis display to refresh automatically updated when you change your selection in the data window.

When the button is not selected, the display is not updated until you click the Refresh button ( ).

If you want the graph to refresh automatically during playback or input monitoring, select the Real Time Monitoring button ( ).

Viewing multiple spectrum graphs

Once you create a selection in the data window, you can display up to 64 individual spectrum graphs (each representing a specific point in time).

1.Open an audio file.

2.From the View menu, choose Spectrum Analysis. The Spectrum Analysis window appears.

3.Click the Settings button ( ). The Spectrum Settings dialog appears. For more information, see Adjusting Spectrum Analysis settings on page 253.

4.Type a number in the Slices displayed box. The Forward and Backward radio buttons activate.

5.Select either the Forward or Backward radio button.

•Selecting the Forward radio button displays the first slice of the selection in the foreground of the spectrum graph.

•Selecting the Backward radio button displays the last slice of the selection in the foreground of the spectrum graph.

CHP. 17

USING SPECTRUM ANALYSIS