Scaler Music have released Scaler Detector

Scaler Music just released Scaler Detector. It can listen to your MIDI or audio, detects the key, and suggests complementary chords.

As someone that is primarily a guitar player that only dabbles in piano playing and usually just figures stuff out by ear, this is a genuinely useful piece of software.

If you already have Scaler 3, there should be a license and download link for this in the product area of your Scaler Music account.

https://scalermusic.com/products/scaler-detector/