# Send MIDI system message - start

``

    midi_start

Sends the MIDI start system message to all connected MIDI devices on all ports. Use the `port:` opt to restrict which MIDI ports are used.

Start the current sequence playing. (This message should be followed with calls to `midi_clock_tick` or `midi_clock_beat`).

MIDI 1.0 Specification - System Real-Time Messages - Start

Introduced in v3.0

## Example

# Example 1
``
    midi_start
| ``
    #=> Send start message to all connected MIDI devices