Never any problem listening to catmusica (Barcelona). They have two classical streams on the net, so one has a choice. I think that they are on 24/7, but I haven't listened beyond about 10pm, MST.

I see http://www.catmusica.cat/index_cm.htm at the top of the page.

Their language is Catalan; no Spanish.

The vocalists are Jonas Kaufman, tenor; Katerina Delayman, soprano; Rene Pape, baix; Peter Mattel, bariton; Evgeny Nikitin, baix-bariton and Runi Brattaberg, baix.
I may try and get a cd of this performance, if it becomes available.