How to achieve real-time auto-accompaniment in Logic Pro

How to Achieve Real-Time Auto-Accompaniment (Arranger Keyboard Style) in Logic Pro?

I’m trying to build a real-time auto-accompaniment system in Logic Pro — something similar to the accompaniment engine of keyboards like Yamaha PSR, Korg PA, or Roland E-Series.

My goal is:

• When I play a chord live on my MIDI keyboard (e.g., D–F–A),
• Logic should detect the chord instantly,
• And shift a pre-recorded MIDI pattern (bass, pad, arpeggio, etc.) to match the chord in real time.
• Basically: a live “arranger” setup inside Logic Pro.