> ## Content Index
> Fetch the complete content index at: https://logicpros.net/llms.txt
> Use this file to discover other available public pages before exploring further.

# How to Use Chord Trigger in Logic Pro
- URL: https://logicpros.net/logic-pro-chord-trigger/
- Published: 2026-10-26T17:48:00.000Z
- Updated: 2026-10-26T17:47:59.000Z
- Description: One key can play any chord you assign. Learn the difference between Single and Multi, build a useful map and choose which MIDI notes Logic records.
- Author: Marcus Sullivan
- Tags: Create, Tutorials, Features & How-To

To use Chord Trigger in Logic Pro, insert it in the **MIDI FX slot of a software instrument track**. Choose Single to transpose one memorized chord, or Multi to assign different chords to individual keys. Use Learn to select the incoming trigger and its outgoing notes. When you want editable chord notes in the Piano Roll, record the output with Record MIDI to Track Here.

[Download](#)

I’d start with a plain piano sound and two trigger keys. A large preset can hide a mapping mistake behind an impressive sound. Get two chords responding correctly, then expand the map. These instructions use Logic Pro on Mac.

## Find Chord Trigger in the MIDI FX slot

1. Select a software instrument track and load an instrument sound. Chord Trigger supplies MIDI notes; the instrument supplies the audio.
2. In the Inspector or Mixer, find the channel strip’s MIDI FX area between the EQ graphic and the Instrument slot. Click that space and choose **Chord Trigger**.
3. Play a note from a MIDI keyboard. Without a controller, choose **Window > Show Musical Typing**, or press Command-K with the default key commands, then play using the computer keyboard.

Apple’s [MIDI plug-in instructions](https://support.apple.com/guide/logicpro/lgcef1c11e8f/mac) place these effects before the instrument and confirm that they can process a MIDI region as well as live keyboard input. The separate [Musical Typing controls](https://support.apple.com/guide/logicpro/lgcpb19cbd34/mac) let you change the played octave with Z and X. If you can’t find MIDI FX, first check that you selected an instrument channel strip rather than an audio track.

Chord Trigger responds to incoming notes. For a song-wide harmonic timeline that a Session Player follows, use the [Chord track progression workflow](https://logicpros.net/logic-pro-chord-progressions/). Assigning a chord to a trigger key serves a different purpose from placing chord symbols at bars in that global lane.

## Choose Single for one shape or Multi for individual assignments

**Single** memorizes one chord and transposes it relative to its assigned trigger key. Suppose C triggers C, E and G. Playing D, two semitones higher, produces D, F sharp and A. It moves the whole shape. It doesn’t turn the second chord into D minor just because your song is in C major.

**Multi** stores a different chord for each assigned trigger. C could play C major while the neighboring D plays A minor. The trigger’s name doesn’t have to match the chord’s root. Apple’s [Chord Trigger parameter reference](https://support.apple.com/guide/logicpro/chord-trigger-overview-lgceb57e806c/mac) distinguishes these modes and the two keyboards: the upper one shows input, while the lower one shows output.

![Single transposes C E G to D F sharp A; Multi maps trigger C to C E G and trigger D to A C E](https://logicpros.net/content/images/2026/10/logic-pro-chord-trigger-modes.webp)

Single shifts one chord shape. In Multi, each trigger has its own assignment, so D can play A minor.

Use Single for moving one voicing around. Choose Multi when you want a particular major, minor or extended chord under each finger. Multi is the clearer choice for the custom map below.

## Learn a custom four-key chord map

Here’s an educational map to program. It isn’t a factory preset or a recorded performance. Use four neighboring white trigger keys, C, D, E and F, in a low register. Choose the output notes in a comfortable register for the instrument:

- **Trigger C:** C, E and G, giving C major.
- **Trigger D:** A, C and E, giving A minor.
- **Trigger E:** F, A and C, giving F major.
- **Trigger F:** G, B and D, giving G major.

Those letters specify chord tones. Choose their octaves so the part fits the song. You can change the voicing later without changing which trigger calls it up. Keep Chord Transpose at 0 while building this example so an additional transposition doesn’t obscure the assignments.

1. Click **Multi**. On the upper keyboard, drag the range bar’s handles so the blue trigger range includes your chosen C through F.
2. Click **Learn**. Its label changes to **Trigger Key** and blinks.
3. Click your C trigger on the **upper** keyboard. The Learn button’s label changes to **Chord**.
4. Click C, E and G in the chosen register on the **lower** keyboard. Clicking an assigned note again removes it.
5. Click Learn to finish the assignment. Play the C trigger and check that the lower keyboard indicates the intended three output notes.
6. Repeat the Learn, trigger, notes and finish sequence for D, E and F using the map above.

This follows Apple’s [onscreen chord-assignment procedure](https://support.apple.com/guide/logicpro/lgce9d7955e9/mac). The input and output keyboards do different jobs. Choosing the upper D selects the trigger, and choosing A, C and E below defines what it will play. Leaving Learn active while trying to perform can turn an intended audition into another edit.

If you prefer learning from a MIDI keyboard, open the extended parameters with the disclosure arrow at the lower left. Assign a note in **Learn Remote**, then use it to start learning, play the trigger, play the chord notes and use the remote note again to finish. Choose Off when you no longer need that remote control. Reserve a key you won’t accidentally play during the part.

## Set the range without creating unexpected silent keys

The blue range defines which incoming notes Chord Trigger processes. Notes outside it pass through unchanged. That lets a low register trigger chords while higher notes play a melody through the same instrument.

In Multi, an unassigned key **inside** the range is silent. Our C-through-F example also includes the black keys between those white keys. They don’t get chords automatically. Assign them deliberately or leave them unused. Apple’s [trigger-range rules](https://support.apple.com/guide/logicpro/lgce9d7955e9/mac) also explain that shortening the range hides assignments outside it without deleting them.

Dragging a range handle changes its boundary. In Multi, dragging the **center of the range bar** moves the stored assignments and transposes their chords together. That’s a different operation. Use the separate Chord Transpose field when you want to change chord playback pitch without deliberately moving the trigger positions.

## Record the trigger keys or the resulting chord notes

Decide which version you want to keep. Recording ordinary keyboard input preserves the notes you play, with Chord Trigger generating the harmony during playback. Recording after the effect captures the generated chord notes for individual editing.

For editable output, Apple documents [Record MIDI to Track Here](https://support.apple.com/guide/logicpro/lgcp423beea5/mac). It captures MIDI effects above the chosen point in the chain. Effects below that point aren’t included.

1. Keep a separate copy of your trigger region and project before replacing a part. For a new take, use an empty section of the track.
2. Click the arrows near the right edge of the Chord Trigger label in the channel strip. Choose **Record MIDI to Track Here**. Two small yellow triangles mark the recording point below it.
3. Select the software instrument track, enable it for recording, start recording and play the trigger sequence from a MIDI keyboard or Musical Typing.
4. Stop and open the resulting region in the Piano Roll. Check for the actual chord notes, their lengths and any unwanted overlaps.
5. Audition the captured notes with Chord Trigger bypassed, or use an instrument-only copy of the track. This avoids sending printed chord tones through a new round of trigger assignments.

To remove that recording point, choose Record MIDI to Track Here again from the menu of the effect directly above its triangles. Keep the trigger version if later map changes should reshape the harmony. Keep the output version when you want to change individual notes in the [Piano Roll](https://logicpros.net/logic-pro-piano-roll/).

Clicking the keyboards inside Chord Trigger is useful for learning and auditioning assignments. For this recording procedure, send actual input notes from your controller or Musical Typing. A chord you hear from an interface click doesn’t prove that a trigger note has been written into a region. The [MIDI recording guide](https://logicpros.net/how-to-record-midi-logic-pro/) covers track and take setup.

## Save the map and add rhythmic movement when needed

Chord Trigger’s settings are stored with the project. For reuse elsewhere, open the plug-in window’s Settings menu and choose **Save Setting As**, then give the map a useful name. Apple’s [plug-in settings guide](https://support.apple.com/guide/logicpro/lgcp4dcb0092/mac) distinguishes this from Save Setting, which overwrites the existing setting. Save a new version before replacing a map you want to keep.

To [remove one assignment in Multi](https://support.apple.com/guide/logicpro/lgce9d7955e9/mac), click Clear and then its upper trigger key. **Option-click Clear erases all assignments in Multi.** That’s a reset operation. It isn’t how you finish learning. In Single, Clear erases the one memorized chord.

If you want one trigger to produce a moving pattern, place **Chord Trigger before Arpeggiator** in the MIDI FX chain. Its chord output then becomes Arpeggiator’s input. Apple documents [MIDI effects running in series before the instrument](https://support.apple.com/guide/logicpro/lgcef1c11e8f/mac). Our [Arpeggiator guide](https://logicpros.net/how-to-use-arpeggiator-in-logic-pro/) covers rate, note order and latch. To record both effects, put the recording point after Arpeggiator instead of between them.

## Fix silence or the wrong chord before changing the whole setup

- **Only some keys are silent:** inspect the blue range and assignment dots. In Multi, an empty assignment inside the range is a likely cause.
- **Every key is silent:** check that input reaches the selected instrument track and that an instrument is loaded. Bypass Chord Trigger to separate an input or instrument problem from a map problem.
- **Every chord has the same major or minor shape:** check for Single mode. Use Multi to store different chord qualities.
- **The right assignment plays at the wrong pitch:** check Chord Transpose, whether you moved the center of the range, and any other MIDI transposition in the chain.
- **The Piano Roll contains only one note per change:** check whether you recorded input triggers or placed the recording point after Chord Trigger. Those are different representations of the part.

Chord Trigger is also included on iPad, but its controls are arranged differently. Apple’s [iPad parameter reference](https://support.apple.com/guide/logicpro-ipad/chord-trigger-overview-lpipdcde4fee/ipados) uses a Trigger Key menu, Range Low/High controls and a separate Clear All button. Follow that interface rather than looking for the Mac keyboard-range handles.

I’d keep the map small until it supports the phrase. A few deliberate voicings are easier to perform and revise than dozens of assignments you can’t remember. Use the [Create Music guides](https://logicpros.net/logic-pro-create-music/) when the part is ready to join the arrangement.