Pascale Guilloux compiled an Excel file showing which musicians at which time played with which orchestra.
2007-10-01 the file was published via tangoDJ, a group which is not fully open accessible.
You can find the file at
- https://tango.info/x/xls/ or
- http://groups.yahoo.com/group/TangoDJ/files/ (need to be member of the group)
The next version may contain the tango.info person codes. t.i database has lot of orchestra-singer relations in the CD tracks related database tables. Maybe these two sources can be automatically compared against each other.