Once the ROCCA module and all supporting modules have been loaded, you are ready to display audio data on the spectrogram. To do so, press the button labeled with a stop-sign icon located just under the toolbar.
To classify a whistle using ROCCA, select the whistle from the scrolling spectrogram display by drawing a box around it. To do this, move the cursor to one corner of the whistle, press and hold the mouse button while dragging the cursor to the opposite corner, and release the button. A red box will be drawn around the selection, and the time and frequency of the starting point (lower left corner) and ending point (upper right corner) are displayed in the ROCCA sidebar for reference. When you box the first whistle in an encounter, you will be prompted for an encounter number.
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