Logic Pro includes a metronome, which plays a steady beat (like a “click track”) to help you play and record in time. You can turn the metronome on or off when you’re recording, or any time your project is playing. The metronome always plays at the project tempo. This means that if a tempo map has been created by Smart Tempo, the metronome automatically follows it. It also means that if Smart Tempo is automatically adapting the project tempo to the performance being recorded, the timing of the metronome adapts along with it. For more information about Smart Tempo, see Smart Tempo overview.
The included metronome uses a dedicated software instrument named Klopfgeist to generate clicks. You have the option of using any audio or MIDI instrument to generate metronome clicks. You can also access a pop-up menu to set if you want the metronome to play during playback, recording, or both.
You can also set the metronome to play a one-measure “count-in” before recording starts.
Do one of the following:
Click the Metronome button 
in the control bar.
Press the keyboard shortcut assigned to toggle the metronome on and off.
Click-hold the Metronome button in the control bar.
To limit the metronome to only click when you toggle the metronome on, choose Simple Mode. With this mode selected, the other metronome settings in the pop-up menu are unavailable.
If you want the metronome to click during recording whether or not the metronome is toggled on or off, choose Click While Recording.
If you want the metronome to click only during recording count-in whether or not the metronome is toggled on or off, choose “only During Count-In.”
Note: Click While Recording must also be chosen for “only During Count-In” to work.
If you want the metronome to click during playback, choose Click While Playing. This setting has the same effect as toggling the metronome on and off.
You can choose Metronome Settings from this menu to access the rest of the metronome settings available in Project Settings > Metronome. For more information, see Metronome settings.
Do one of the following:
Click the Count-in button 
in the control bar to have the metronome play a predefined count-in before recording starts.
Press the keyboard shortcut assigned to toggle the count-in on and off.
Do one of the following
Choose Record > Count-in, then choose the number of bars from the submenu.
In Project Settings > Recording, choose the number of bars from the Count-in pop-up menu.