In the filter window, you will see several features. First, you’ll notice sliders that control various filter parameters. These sliders can be adjusted while you listen to the audio so you will instantly hear the result of any changes you make.
Next, you’ll have Radio buttons that control other aspects of the filters. Again, you can change them while listening, so you’ll hear the results instantly. The Radio buttons in the Impulse filter are Speed and Accuracy.
In every filter, you will have a Preview button. This is the most important button here. This button will start the audio playing while the filter is processing it. You will hear the results of the filter instantly. This makes for easy adjustment of the filters.
Also in every filter, you will have a Bypass checkbox. This takes the filter in and out of the audio stream instantly. When you listen to a filter being applied by the Preview button, you may want to be able to compare the processed audio to the original audio. Clicking this checkbox will bypass the filter and you’ll be hearing the original audio. Unchecking it will instantly put the filter back into the signal path. This way, you can “fine tune” even subtle effects with MILLENNIUM.
Lastly, every filter will have controls for Presets. A preset is a saved group of settings for this filter. Go ahead and drop down the Preset box now – it’s the white box at the bottom of the filter. Click on some of the presets and watch the sliders as they move to good starting points for common tasks. You can tell a lot by looking at the name of the presets. Now select the preset labeled Demo Audio Wavefile Declick. This one is already set up with good settings for our Demo1 file. Every filter will also have a Save and Delete button that allows you to save your own presets under any name you want – and delete them too!
You’re probably ready to try this filter by now, but there is one more thing that is common to each filter that you should know. Don’t close the Impulse Filter, but Click on the Help dropdown at the top of the program screen. Now click on Contents and choose Filter Tutorials. Now click on the Impulse Filter. Notice that this gives you a complete explanation of each control in the filter. This type of help is available for every function in the program.
Put the Help screen away and let’s clean some audio. If you’ve already been listening to this filter, then shame on you for jumping ahead. Simon has not said click the Preview button yet. As punishment, please go back to page one of this manual and start reading again. We’ll wait for you here.
Welcome back. Now let’s get started by clicking the button labeled Preview. You will hear the audio as it is being filtered. You will still hear the low frequency rumble and the hiss, but the clicks should be gone. Let it preview all the way to the end of the file. Notice that once it reaches the end, it will automatically start over at the beginning. This is called Looping and is automatic when you are previewing with a filter (thought it can be turned off in the Edit/Preferences screen).
Let’s just confirm that the clicks are gone. To do this, check the Bypass box in the filter while it is still previewing. Now the filter is bypassed and the clicks will once again be audible. Listen for a while and then uncheck the Bypass box. Now the filter is again doing it job and the clicks are no longer heard.
It’s time to learn how to adjust a filter. While you are previewing, move the tracking slider all the way to the top. This makes the filter less aggressive and it will filter less. Notice that the clicks have returned now. Slowly move the tracking slider down and you’ll hear more and more of the clicks getting removed. All the filters work this way – you just adjust them while you listen. As you might expect, if you move them too far you’ll make the filter too aggressive and you’ll get distorted, stuttering or otherwise bad audio
just move them enough to get the desired result. Set the tracking back to a setting of 1.
While you are still previewing, note the Progress window shown below. This window shows the total number of clicks as well as the click/second that are being found and repaired. For most recordings, you’ll be set in the ballpark when you are finding between 10 and 30 clicks per second. This will jump around some, which is normal. Now click on Cancel in the Progress window: