I put together these Playlists originally for my students to learn about the different Tango artists and Orchestras. They can be used as a good starting point to learn about the differences between Orchestras. I have also organised them in tandas, so you could have your own local Practica / Milonga with your friends.
Start with these 4 playlists first. Di Sarli, D'Arienzo, Biagi and Pugliese are arguably the biggest legends of Tango who who effectively defined the type of music in their era.
And then move on to these collection of Milonga and Vals Tandas from different Orchestras. For the benefit of Beginners to Tango, Tango music can be broadly classified into Tango, Milonga and Vals. Milonga and Vals Tandas tend to consist of only 3 songs rather than the usual 4 for Tango when played in a Milonga, the social place where you dance Tango.
There are tandas of some more orchestras below. I hope to keep updating these Playlists, so do come back and check them out again soon.