Using Pitch Correction In Logic Pro X

One of the marquee features in Logic Pro X is Flex Pitch. David Earl (aka. SFLogicNinja) dives in to showcase just how effective the pitch manipulation is and how it works.

Of all of the great new features included in Logic Pro X, Flex Pitch is a real game changer. Many companies have come before with offerings for time and pitch manipulation, so it's interesting to see how Apple was going to change the game. There are many details that many may miss on accident if they weren't looking closely. Apple put their thinking cap on to make this, and came up with something powerful, flexible, and.. well.. slick.

But, for 1/3 the cost of Logic itself, it should be better. The pitch correction plugin in Logic is very good. In fact, it's very similar to the automatic mode of Autotune. However, you can't use it in graphical mode like the Antares plugin. I found it OK, but found the power of Melodyne to be much more useful. While using Logic's own pitch correction I am constantly dealing with pops in the vocal tracks. I try to work around this by automating the response time or automating a bypass etc. But it doesn't seem right that I should be implementing these work arounds on this native plug-in. The pops can be quite random too and occur in some passes but not.


Starting Flex Pitch in Logic Pro X

We've got some vocals to tune! To get them ready, we need to turn on Flex mode:

  1. Turn on Flex mode by clicking the Flex mode button in the main window
  2. Turn on Flex mode on the tracks to be flexed
  3. Choose Flex Pitch from the list of available algorithms

Flex Pitch is separated out from the rest of the algorithms, because we can mess with pitch as well as time. Instead of giving us Flex and transient markers, Flex pitch will be using notes. Here's how everything looks in the Main Window:

Getting Flex Pitch going in the Main Window of Logic X.


Working with Notes in the Main Window

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The notes Flex Pitch has detected show up as very thin blue lines within the region we wish to edit. In the Main Window, we are able to do global changes to the pitch of our audio region. Flex Pitch is pretty good at detecting the correct pitch, and we may be able to edit all of the notes in the Main Window and be done! (If only we were so lucky.)

  1. Hold Shift, and lasso the notes within the region in the arrange window that are to be tuned.
  2. Click inside the shaded area of the note, click and hold, and pull down.
  3. You'll hear the pitch being changed, and when the pitch comes close to the center of the region, the notes should lock at their perfect pitch.
  4. Have a listen to your work.

The Flex Pitch Tool displays a useful position and pitch readout.


With Flex Pitch in the Main Window, we are offered very sweeping changes. Flex Pitch is pretty good at finding the pitches, and the correction is usually pretty good, but to get the job done properly, we are going to need to use the Audio Track Editor.


Working with Flex Pitch in the Audio Track Editor

The Audio Track Editor is new to Logic Pro X, and is a wonderful way to do fine editing of Flex Pitch. To open the Audio Track Editor, simply double-click at the top of an audio region that is to be flexed.

The Audio Track Editor has an inspector on the left side, and the notes show in a grid on the right. The inspector is used for changing the pitch and time of several notes at once, and the grid to the right of it is where notes are meticulously edited individually.

Flex Pitch at work in the new Audio Track Editor.

How To Use Pitch Correction In Logic


Using the Inspector for Flex Pitch

To use the inspector, simply select whatever notes you wish to edit, then choose one of the following actions:

  • Time Quantize - This takes notes and quantizes them to a grid, similar to MIDI notes in the Piano Roll editor
  • Scale Quantize - This will confine the note pitches to a specific scale
  • Pitch Correction - This will try to change all pitches so they are closer to their '˜perfect' state. With a slider, this can be done in degrees
  • Gain - This will adjust the gain of any selected notes

The Inspector provides useful controls to manipulate the pitch of your audio files.


The inspector is more discerning than the Main Window, but for detailed work, it's advised to get inside the region and work with individual notes.


Hot Zones

In the region area to the right of the inspector, we have notes. These notes have six hot zones on them. They are on the left and right upper and lower corners, and they are also found midway across on the top and bottom of the note.

These hot zones perform the following functions:

  • Pitch drift in/out - For sliding from one note pitch to another
  • Vibrato - Performance a little shaky? We can fix that.
  • Fine Tuning - In cents, (100 cents per semitone)
  • Gain - Increase and decrease gain, and watch the waveform change
  • Formant - Make you voice sound natural when higher or lower in pitch. (Can also be dastardly turned into the Mickey Mouse or Frank Zappa tool).

Hot Zones provide convenient and quick access to essential functions when using Flex Pitch.


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Finding Creative Uses for Flex Pitch

So we know the basic anatomy of Flex Pitch. Creatively, what can we do besides tuning vocals?

  • A nice place to start is copying regions with Flex Pitch data and then tuning them up or down to create backing vocals.
  • Another good creative use of Flex Pitch is to take instruments that have no (or dubious) pitch, and forcing them into line.
  • There are also other features built into Flex Pitch that take advantage of the detected note data. MIDI can be generated from this powerful tool and reused in other areas.
  • Create new notes in the Audio Track Editor that allow you to create alternate melodies.
  • Radically alter formants to give a vocal an extremely freaky vibe. Artists to listen to for inspiration are Grimes, Fever Ray, and CocoRosie. Interesting and weird.


Conclusion

Flex Pitch is not just a tool for out of tune singers. It can be used to greatly change the timbre and emotional feel of not only a vocal, but any other instrument that is put under its influence. Copying and pasting several regions of Flex Pitch data will help create iterations of melodies and motifs that quickly spin into insanely creative territory.

The fact that all of these techniques are extremely intuitive gives users a big leg up over programs like Melodyne and Auto-Tune. In these programs, you had to first write the audio in real time into the plug-in, where the content stayed, even when a region in the Main Window was deleted. I don't know how many times I ended up with a vocal on my percussion stems because of this. Thanks to Logic Pro X's new Flex Pitch, I don't believe that is going to be a problem anymore.


To learn more about Flex Pitch, check out this tutorial:


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Almost every chart-worthy pop song features auto-tune style vocals of sorts. If you are a Logic user you can get in on the fun by using the Pitch Corrector in real time on any audio source. Here's how

Using Logic Pro's Pitch Correction plug-in to 'force' the pitch of a vocalist's melody creates a sound that is currently fashionable. With a response time set to 0 ms you can predetermine the notes in a melody or even change the key of a performance by selecting pitches in the plug-in. Even a pitchless performance (a rap, for example) can take on melodic qualities using this technique. To take this one step further, how cool would it be if you could play the notes in the Pitch Correction plug-in in real time?


Step 1

Load Logic's Pitch Correction plug-in as an insert into the channel you wish to affect, and bypass it.


Step 2

Open Logic's Controller Assignments window: Logic Pro > Preferences > Control Surfaces > Controller Assignments (Command-K). Ensure that the Controller Assignments window is in Expert View then arrange the plug-in window and the Controller Assignments window so that you can see both.

Logic's Controller Assignments window in Expert View.


Step 3

If there are any assignments already listed in the Controller Assignments window that you are not using, select them and click '˜Delete'.


Step 4

Enter '˜Learn Mode' by clicking the Learn Mode button.


Step 5

Click on a C key in the Pitch Correction plug-in then press the same C on your MIDI keyboard. The octave you choose should be outside the range you are using to play notes in any software instrument tracks, if your MIDI keyboard is being used in this role in the project.


Step 6

In the Controller Assignments window, an entry should appear in the Control column (see image below) that says '˜Learned'. Over in the Value section change the Mode from '˜Scaled' to '˜Toggle'.

Change '˜Scaled' to '˜Toggle' in the Value section. Adobe premiere pro 32 bit cracked.


Step 7

Press the B key in the Pitch Correction plug-in followed by the same B key on your MIDI keyboard, 11 semitones 'a major seventh ' above the C key that you played in Step 5. Again, change '˜Scaled' to '˜Toggle' in the Value section.


Step 8

Go out of '˜Learn Mode' by deselecting the Learn Mode button. You should see the following message (see screen shot below). Click OK, then close the Controller Assignments window.

Clicking OK fills in the gaps if you have defined the first and lats steps in a row of parameters. This will save you clicking each and every note in the plug-in.


You should see this list of assignments when all notes are assigned.


Step 9

Click all the remaining notes in the Pitch Correction plug-in (C# through to A#) so that all notes are '˜off'.

Click all notes '˜Off' in the plug-in before playing them with your MIDI keyboard.


Pitch Correction Logic Pro X 2020

You should now be able to play the Pitch Correction plug-in notes from your MIDI keyboard. For best results, this works well with non-melodic vocals or vocals sung on only one note. To increase the robotic effect, reduce the response time to 0 ms. Enjoy!!

Autotune Plugin Logic

Interested in more Logic tips and tricks? Check out Logic 304: Logic TNT3: Reloaded