What a piece is this?

[gprengel]

Are you ready for another quiz? Do you know this piece which I just orchestrated? --> http://www.gerdprengel.de/xxx.mp3

[Roman Koval]

If I'm not late, it is Mozart's Adagio (https://musescore.com/user/11373346/scores/2903836)

[Peter]

Yes, Peter, I knew you would recognise it...

Not immediately. I knew it was by Mozart and that it was a piano piece. It's a long time since I heard K540 so my immediate thought was a sonata slow movement, then I realised there were hardly any Sonata slow movements in a minor key and the B minor Adagio came back to me!

[gprengel]

Yes, Peter, I knew you would recognise it...

[Peter]

This is the Adagio in B minor by Mozart K540.

[gprengel]

I'd like to have another quiz with you again: Today I finished this orchestration and ask you - what might be the wonderful original composition?

http://www.gerdprengel.de/piece11.mp3

Gerd