Replace audio recordings in Logic Pro for Mac
You can record over an existing audio recording, or a portion of it, replacing the original recording with the new recording. You do this by recording in Replace mode. In Replace mode, any audio regions from when you start recording until the end of recording will be erased, even if nothing is played.
You can access the Replace pop-up menu by clicking and holding (or right-clicking) the Replace button 
in the control bar or in the Recording Settings pane.
Note: You can also replace software instrument recordings. For information on replacing MIDI recordings, see replace software instrument recordings.
When Enable Complete Features is selected in Logic Pro > Settings > Advanced, Replace recording is available.
Replace an audio recording
In Logic Pro, click the Replace button
in the control bar.Click the Record Enable button
in the track header of the track you want to record to. The button blinks red to indicate that the track is ready for recording.Move the playhead to the point in the ruler where you want to start recording.
Set the metronome for recording, if desired.
Click the Record button
in the control bar (or press R) to start recording.Start singing or play your instrument.
Click the Stop button
in the control bar (or press the Space bar) to stop recording.A new audio region is created on top of the existing one.
The original recording is replaced with the new recording.