Make sure to enter the number of bars in the pattern in the 'Clock Start: with a pattern length of Bar(s)' field, under the MIDI Clock mode pop-up. 'Pattern' mode sends a Start command to an external device like a sequencer to start playback of a pattern on the device.Choose a mode from the Clock Mode pop-up menu that works best for your workflow and the MIDI devices you’re using: The MIDI clock mode determines how and when Logic sends MIDI clock to your destinations. After you add destinations and set options, set the MIDI clock mode for your project.
