“I saw this and loved it but ask yourself one question?
How did they get such clean, well balanced audio?”
This was posted on YouTube by BancSabadell:
On the 130th anniversary of the founding of Banco Sabadell we wanted to pay homage to our city by means of the campaign “Som Sabadell” (We are Sabadell) . This is the flashmob that we arranged as a final culmination with the participation of 100 people from the Vallès Symphony Orchestra, the Lieder, Amics de l’Ã’pera and Coral Belles Arts choirs.
Sounds – and looks – like it was synced with field playback to a studio recording.