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4.Use the toolbar at the top of the window to set your display options.

Tip: You can also click the Settings button ( ) in the Spectrum Analysis window to set additional options.

The spectrum graph displays the amplitude (in dB) of each frequency component from 0 Hz (DC) to the Nyquist frequency.

Tip: You can continue to make selections in the audio file with the Spectrum Analysis window open (just move the cursor or make selections as you normally would in Sound Forge). Click the Refresh button in the Spectrum Analysis toolbar to update the display. If no selection is made, analysis is performed on the samples immediately following the cursor position.

Monitoring an input and output source

Click the Real Time Monitoring button () to turn real-time spectrum analysis on or off. Click the down arrow next to the button and choose Monitor: Input to monitor the device selected in the Record drop-down list on the Wave tab of the Preferences dialog (to access the Preferences dialog, choose Preferences from the Options menu).

Real-time output monitoring is not available in sonogram display mode. When you click the down arrow next to the button and choose Monitor: Output from the menu, Sound Forge will monitor the device selected in the Playback drop-down list on the Wave tab of the Preferences dialog, and a cursor is displayed in the graph to indicate the play position.

Note: When Monitor: Output is selected, the post-processing signal is monitored when you start playback from the Plug-In Chainer.

Displaying frequency and amplitude values, notes and statistics

As you move the cursor through the spectrum graph, the amplitude and frequency values at the current position are displayed in a ToolTip next to the cursor and in the Statistics area at the bottom of the window:

Use the cursor to display amplitude and frequency values

Statistics area

CHP. 17

USING SPECTRUM ANALYSIS