10.6

646Logic Pro User Guide
Extract loops from audio cells
Logic Pro can analyze the musical and sonic characteristics of a longer audio file in an
audio cell and extract the best sounding loops to empty cells (up to 10) on the same track.
You can choose the length of loops you want to extract, or let Logic Pro extract the best
loops of any size.
By default, Logic Pro examines only the detected downbeat positions for potential loop
start points. However, you can deactivate this setting to let loop points be set at other
musically meaningful positions. You can always manually change the resulting loop points,
if necessary.
To work effectively, loop extraction requires audio containing repetitions and accurate
tempo information. To get the best results, check the cell in the Smart Tempo Editor before
extracting loops and determine whether they show accurate beat mapping.
The loop extraction algorithm looks for loop points that deliver a smooth transition from
loop end to loop start. Those loop points may not necessarily coincide with the musical
structure of the analyzed audio.
• In Logic Pro, Control-Click an audio cell and choose any of the following from the
Extract Loops submenu:
• Set Optimal Full Loop: Extracts the longest loop within the selected cell.
• Extract Best 2-Bar Loops: Determines the best two-bar loops and copies them to the
next empty cells to the right.
• Extract Best 4-Bar Loops: Determines the best four-bar loops and copies them to
the next empty cells to the right.
• Extract Best 8-Bar Loops: Determines the best eight-bar loops and copies them to
the next empty cells to the right.
• Extract Best Loops of Any Size: Determines the best loops of any size throughout the
audio file and copies them to the next empty cells to the right.
To consider all musically meaningful positions for potential loop start points, not just
downbeats, make sure Limit Loop Points to Downbeats is turned off in the Extract Loops
submenu.
Loop extraction is disabled if:
• The cell is empty or contains multiple regions.
• The region in the cell is shorter than two bars.
• Flex & Follow in the Cell inspector is turned off.
• The cell contains Apple Loops or untagged loops.
• Multiple cells are selected.