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Change the musical length of a pattern in Logic Pro for Mac

Several factors determine the musical length of a Step Sequencer pattern (the time in bars and beats before the pattern repeats) in Logic Pro for Mac. The most fundamental are the pattern length, which determines the maximum number of steps available to each row, and the pattern step rate, which determines the length of each step in musical divisions (note values). Step Sequencer features pattern length options for 3/4, 4/4, 5/4, and 7/8 time signatures.

Another important factor affecting the musical length of a pattern is the Loop Start/End edit mode. Using Loop Start/End, you can set the number of steps for each row independently from the pattern length and the length of other rows. Technically, the musical length of a pattern is the length of the longest row. For example, if all rows in a pattern loop after 4 steps, and each step has a step rate of 1/16, then the musical length is only one beat (1/4), even if the pattern length is 16 steps or longer.

When row lengths are evenly divisible with one another, the overall length is equal to the longest row. For example, if you shorten several rows in a 16-step pattern to four or eight steps (which both divide evenly into 16), the pattern remains a one-bar pattern. When row lengths are not evenly divisible, however, the musical length is increased (sometimes substantially) because the pattern doesn’t repeat until all rows start at the same time again.

Using the Skip edit mode can also result in the length of rows changing, which affects the overall musical length of the pattern in a similar manner to changing the Loop Start/End setting.

The playback mode can also affect the musical length of the pattern. Choosing Ping-Pong as the playback mode doubles the pattern length, while setting any row to Random playback mode can result in the musical length of the pattern being essentially infinite.

Ultimately, how long a pattern plays in a project depends on the length of the pattern region or pattern cell. If the musical length of the pattern exceeds the region or cell length, it plays only until the end of the region or cell is reached. When the region or cell length exceeds the pattern length, the pattern repeats until the end of the region or cell, or restarts if the region or cell is looping. If the musical length of the pattern, or of any row, does not fit equally into the region length (or cell length), then the rows in the pattern restart before they complete a full cycle.

When the pattern length is more than 16 beats, the entire pattern may not be visible in the step grid, depending on the zoom level. In this case, the pattern is divided into sections called pages, each showing a part of the complete pattern. An overview of each page appears above the step grid.

Change the pattern length

  • In Logic Pro, choose a new length from the Pattern Length pop-up menu in the Step Sequencer menu bar.

    The menu is divided into sections for different time signatures:

    • 4 Based: 4/4 time signature

    • 3 Based: 3/4 time signature

    • 5 Based: 5/4 time signature

    • 7 Based: 7/8 time signature

When you increase the pattern length, the added steps duplicate the existing pattern. You can edit the added steps to add variation or change the pattern.

When the pattern length is more than 16 beats, an overview of each page appears above the step grid. You can click the page overviews to quickly switch between different parts of the pattern and to cut, copy, and paste a page overview.

You can also change the pattern length in the Step Sequencer inspector.

Change the step rate for the pattern

The step rate sets the duration of steps in the step grid as a note value. You can set the step rate for the overall pattern and also use the Step Rate mode in the edit modes to set a different step rate for individual rows and steps.

The following table provides the step rates and their musical lengths for Step Sequencer in Logic Pro.

Step rate

Musical length

4

4 whole notes

2

2 whole notes

1

1 whole note

/2

Half note

/4

Quarter note

/8

Eighth note

/16

Sixteenth note

/32

Thirty-second note

/64

Sixty-fourth note

1T

Whole-note triplet

2T

Half-note triplet

4T

Quarter-note triplet

8T

Eighth-note triplet

16T

Sixteenth-note triplet

32T

Thirty-second-note triplet

1D

Dotted whole note

2D

Dotted half note

4D

Dotted quarter note

8D

Dotted eighth note

16D

Dotted sixteenth note

32D

Dotted thirty-second note

64D

Dotted sixty-fourth note

  • In Logic Pro, choose a new step rate from the Pattern Step Rate pop-up menu in the Step Sequencer menu bar.

You can also change the step rate for the pattern in the Step Sequencer inspector.

Cut or copy and then paste a page

You can quickly cut, copy, and paste page overviews. This is useful when you’re creating a pattern that’s longer than 16 bars, and you want to apply the same edits to more than one section of the pattern.

  1. In Logic Pro, Control-click a page overview to select it, then choose Cut or Copy.

  2. Control-click the destination page overview, then choose Paste.

Clear a page

You can clear all the steps in a page using the page overview.

  • In Logic Pro, Control-click a page overview to select it, then choose Clear.

Download the guides:

Logic Pro User Guide: PDF

Logic Pro Instruments: PDF

Logic Pro Effects: PDF

Control Surfaces Support Guide: PDF

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