This sort of thing is right up my alley--I wish I were going to be in Hamburg to join!
Hans-Arthur Marsiske presents
"Interstellar Jam Session"
in Deep Space Souterrain, Clemens-Schultz-Straße 90, Hamburg, Germany
Together with the visitors we are going to play a blues with 30 verses. Since a blues is a musical scheme with 12 bars, this adds up to 360 bars. Both are basic numbers for any human culture, indicating the relationship of Earth's rotational and orbital period and the Moon's orbital period. The musical structure thus already contains some fundamental information about humanity, while at the same time providing room for individual expression. I think, it might be a good way to say "hello" to our galactic neighbours -- and an interesting approach to get a feeling for our place in the Universe.
On my blog Weltraumspaziergaenge you can find a little bit more of information (in English and German). But, of course, I'm happy to answer any questions that you might have.