Hello Bob,

The metronomeless feature has not been released in any version of Composer yet, but it will be included in a new version of Composer this spring.

Your comment about rubato points to the challenge of metronomeless transcription. Rubato actually can be a challenge even to a musically knowledgable listener. And, for sure, a musically knowledgable listener is going to transcribe rubato better than any software ever will. So, yes, there will be limits to how responsive the metronomeless transcription will be to rubato.

If you hear a MIDI file with a lot of rubato, and if the rhythm of the notes look correct, then most likely the notes for this MIDI file were entered by hand, and then the rubato tempo map was added afterwards. With the upcoming metronomeless feature, this won't be necessary.

Cheers
-- Mark