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When editing audio, the Pencil tool has one function: to redraw waveforms. Often this is done to repair waveforms, such as to eliminate a pop or a click on the track. To do this, we need to zoom in all the way so that the waveform becomes a single line. Let's go to the Zoom tool, and we can click down here to zoom in. Or, what's even faster is we can use this preset number 5, and it will zoom straight in to the sample level. Now if we go to the Pencil tool, we'll just choose the Free Hand tool, I can click and drag, and that becomes the new waveform.
If you save the session after redrawing this waveform, the audio file is permanently changed. However, you can undo this, and I'm going to do that right now. Now, there are seven flavors of the Pencil tool: Free Hand, Line, Triangle, Square, Random, Parabolic, and S- curve, and you can use the F10 key to scroll through these. The Pencil tool has a lot of uses; however, not a lot of them are audio-editing related. So I'm going to mention just a few of them here quickly, and then cover most of the features of the Pencil tool in other movies.
So first, I'm going to zoom out. So I'm going to double-click the zoomer, and then go back to the Free Hand Pencil tool. If I take the Pencil tool down to this automation lane, I can click and drag to draw new automation. I can also go to the Tempo editor and click and draw in tempo changes. I can insert MIDI notes, so I'll go to this track and zoom in a little bit, so you can see it. Back to the Pencil tool, and when I click, it starts adding notes.
And what's cool about this Pencil tool is that it actually is kind of like a smart tool, because as you can see here, it actually turned into a trimmer when it's near the edge of a MIDI note. So I can click and drag to extend or shorten that note. It also turns into the grabber, which you can click and then drag and move those notes around. And what makes it even smarter is that you can press the Option key on a Mac or the Alt key on a PC, and the Pencil tool flips around and turns into an eraser, so you can erase notes.
If you just click with the eraser, you can erase those notes. And finally, you can adjust the velocities of a MIDI performance. So I am going to just click and drag here, and it's redrawing the velocities for these notes. So as you can see here, the Pencil tool has a lot of functions. I use it for editing audio, MIDI, and automation in every session I work on, and I'm sure you will too.
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