Tango for her

I'm not sure if this is the best piece I ever wrote...but if had opened a bank account for all the sighs it brought out of the girls who heard it, I'd be a very, very rich guy...

arr: violin, bandoneon, piano & double bass
alt. arr: violin, clarinet, piano & double bass;
             string quartet; violin & piano; violoncello & piano
dur: cir. 4,5 min.