The star of this dramatic mixed tanda is vocalist Alfredo Del Río. As Abel Palermo notes in his biographical sketch, Del Río’s “great vocal facility, his special sense for interpretation, and his discipline and responsibility about taking care of his voice made him become a great professional.” The quality of the two Laurenz numbers–rarely heard at milongas–is not very good, but I’m not aware of any better transfers.
Update: I had assumed that combining Gobbi and Laurenz in the same tanda was uncommon, but in this recent interview renowned DJ Félix Picherna notes that he used to mix these two orchestras when DJing in Europe.
The discographies of the tango orchestras are scattered all around the web. Below is my best attempt to make the relevant links all available in one place. When I found more than one discography for a given orchestra, I chose the one which seemed most complete and reliable. I plan to keep this post updated, so if you think I’m missing something, please let me know.
Update: See here for my current attempt to improve on these discographies. The links below will gradually link to my own discographies, as they become available.