You now have removed two of the annoying noise types in this file. First, we rid ourselves of the clicks and pops, and then we removed the rumble. Now it’s time to get rid of that loud hiss sound. First, remember to move our Destination file up to the Source window.
Now click on Filter and select the Continuous Noise Filter. This filter is perfect for hiss and other types of continuous noise. Also, click on View and make sure you have Time Display checked at this time. The Time Display box shows you various timing calculations with the program and will come in handy as you will see. Your screen should look something like this:
Figure 8- The Continuous Noise filter is awake
The Continuous Noise filter is one of the most powerful in the whole program so follow along carefully here. This filter will remove just about any continuous noise in a file, but it needs you to give it a sample of this noise. Once it is able to examine the noise, it will be able to seek it out and get rid of it. Play the file now using the Play button at the top and listen carefully to the first couple of seconds. You will hear an area right at the beginning, which contains only the noise and no good audio. That’s a great spot from which to grab a sample of the noise.
To do this, we need to click and drag with our mouse to select this area. The area highlighted in yellow in the illustration above is the area we want to select. Just click about ½ inch from the left edge and, while holding the mouse button, drag all the way left. Let the mouse button go and you will see an area highlighted in bright yellow. This is the area you have selected. Move the mouse pointer over either edge of the selected area and the pointer will turn into a Left/Right indicator. Click and drag as necessary to select an area from the beginning of the file that is about .5 seconds long. Use the “Span=” display in the timer window to confirm that your selection is around ½ second long. Again, you’ll end up with a yellow selected area similar to the one shown above.
Now hit the spacebar. You’ll play only the selected area. It’ll be quick. This allows you to audition a selected area to make sure you are really working on the correct area (does not contain silence or desired signal). You should only hear the hissing noise.
It’s time for the fun part. You will like this. Hit the Sample Noise button in the Filter window. The filter will analyze the noise sample and will display the frequency characteristics of the noise in red. The blue