One of the key benefits of RX is that it allows you to select audio not just by time, but also by frequency. This allows you to do work with sounds that fall in only part of the frequency range at a given point in your project. This is very helpful for isolating and repairing a variety of audio problems including intermittent background noises.
Below the Spectrogram display is a Selection Tools menu that gives you several options:
The Time Selection tool allows you to select a segment of your project along the timeline.
The Time-Frequency Selection tool allows you to make rectangular selections in the Spectrogram Display to isolate sounds by time and frequency.
Selection by time and frequency isolating a background noise for processing
The Frequency Selection tool lets you select by just frequency (vertically in the Spectrogram)
Note that with any of the selection tools, you can hold SHIFT to drag the borders of an existing selection, or ALT to drag it without changing its length.
The Zoom Selection tool, when enabled, zooms into time and frequency selections as you make them.
Find Similar Events
Sometimes you may have many events to manually repair throughout your file that are similar. In cases like this, manually selecting and processing each event can be time consuming. RX includes a Find Similar Event tool which will take your selection, and move it to the next, or a previous, similar event. This is especially useful in conjunction with the Spectral Repair tool, allowing you to process many events without having to manually select each event. To open the Find Similar Events window, go to Edit|Find Similar Event. Then make a selection in the Spectrogram Display, and select Find Next to move to the next similar event to the current selection.