> For the complete documentation index, see [llms.txt](https://docs.acestudio.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.acestudio.ai/project/arrangement-in-canvas/tracks/midi-tracks.md).

# MIDI Tracks

MIDI tracks in ACE Studio manage MIDI clips and host AI voices, AI instruments, or third-party instrument plug-ins.

## Overview

MIDI track can hold MIDI clips and host a sound source: an AI voice, an AI instrument, or a third-party instrument plug-in. You can create, insert, and record MIDI clips on a MIDI track and use the MIDI content to generate sounds with the loaded source.

When a sound source is loaded onto an empty track, or when MIDI clips are present on the track, it becomes a MIDI track. According to the type of sound source attached, MIDI tracks can be divided into 4 sub-types: non-source MIDI tracks, Vocal Tracks, AI Instrument Tracks, and Instrument Tracks.

To create MIDI clips on a MIDI track, you can:

* Double-click on the empty area of the track to quickly create a MIDI Clip;
* Drag a MIDI file on the empty area of the track;
* Record MIDI with a MIDI device, or sync MIDI from your DAW with ACE Bridge.

For more information about MIDI clips, please refer to [Clips](/project/arrangement-in-canvas/clips.md).

## Non-source MIDI track

When you insert a MIDI clip on an empty track or unload the sound source from a Vocal Track, AI Instrument Track, or Instrument Track, it becomes a non-source MIDI track.

On this type of MIDI track, you can create and edit MIDI clips, but the track can only output sounds with a standard piano sample library.

To give the track a sound source, double-click an empty area of the track and choose **AI Vocal** or **Instrument** from the panel that appears, click the <kbd>+</kbd> button on the track header, or drag a voice, instrument, or plug-in onto the track header.

## Vocal Tracks

When AI Voice is loaded onto a track from the [Voice Library](/ai-vocal-synth/voice-library.md), the track becomes a Vocal Track.

* You can drag and drop an AI Voice from the voice library on the track header.
* Drop a new voice onto an existing vocal track header to replace the voice.
* Turning on [Unison Mode for vocals](/ai-vocal-synth/creating-ai-vocals/unison-mode-for-vocals.md) changes the vocal track into a unison track.

### Vocal source management

Click the image on the track header to open the track panel.

* Track image: Click to open [Voice Library](/ai-vocal-synth/voice-library.md).
* Name: Double-click to rename.
* Vocal Synth Model: Click to switch between different versions of the Vocal Synth Model. For more information about the Vocal Synth Model versions, please refer to [Vocal Synth Models](/ai-vocal-synth/voice-library/vocal-synth-models.md).
* Language: Displays the languages supported by the current AI voice.
* Settings:
  * Copy and paste Vocal source.
  * Change track image. The image for a unison track defaults to the loaded AI voice images and cannot be changed.
  * Save your unison or blended preset, or save changes to the preset.
  * Unload Model
* Unison Mode: Click to enable Unison Mode. For more information, please refer to [Unison Mode for vocals](/ai-vocal-synth/creating-ai-vocals/unison-mode-for-vocals.md).
* Blend Voices: You can blend voices here. For more information, please refer to [Voice Blending](/ai-vocal-synth/creating-ai-vocals/voice-blending.md).

## AI Instrument Tracks

When an AI Instrument is loaded onto a track from the **AI Models** tab of the [Instrument Library](/instruments/instrument-library.md), the track becomes an AI Instrument Track.

* You can drag and drop an AI Instrument from the instrument library on the track header.
* If you drop the instrument on an existing AI Instrument Track head, it will replace the instrument of this track.
* Turning on [Unison Mode for instruments](/instruments/create-instrument-sounds/unison-mode-for-instruments.md) changes the AI Instrument Track into a unison track.

### Instrument source management

Click the icon on the track head to open the Instrument source management panel.

* Track picture: Click to open [Instrument Library](/instruments/instrument-library.md).
* Name: Double-click to rename.
* Instrument Category: Displays the type of the current instrument.
* Settings:
  * Copy and paste Instrument source.
  * Save your unison preset, or save changes to the preset.
  * Unload Model.
* Unison Mode: Click to enable [Unison Mode for instruments](/instruments/create-instrument-sounds/unison-mode-for-instruments.md).

## Instrument Tracks

When a third-party instrument plug-in is loaded onto a track from the **Plugins** tab of the [Instrument Library](/instruments/instrument-library.md), the track becomes an Instrument Track. It plays MIDI clips through the plug-in the way a regular DAW does.

* Drag a plug-in from the library onto the track header. Dropping onto an existing Instrument Track or AI Instrument Track replaces its sound source.
* Click the track picture to open the plug-in window. There is no source management panel; right-click the track header to unload the plug-in.
* The Piano Roll shows standard MIDI editing with Velocity and MIDI CC lanes.

For plug-in formats, the plug-in window, and controller editing, please refer to [Third-Party Instruments](/instruments/third-party-instruments.md).


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