[vlovich123]

AFAIK you don’t need an original print. All versions that aren’t materially different lack copyright and are free to distribute.

[Sunspark]

I would say caution is advised. I have seen it argued that one trick to prevent expiry is to re-record the audio with a new orchestra thus causing it to become a new production.

[kingbirdy]

A new score would certainly qualify as "materially different", to GPs point

[Sunspark]

Yes and no. You can still record the original music again, but with a brand new orchestra. Is it materially different then? From a legal standpoint? From an individual standpoint?

[zarzavat]

The answer is yes. There is copyright for the score and copyright for the performance. New performance, new copyright.