Home › Forums › Products › Rackmount › BLACKHOLE 5.1 DO NOT WORK › Reply To: BLACKHOLE 5.1 DO NOT WORK April 1, 2011 at 8:49 pm #133061 ameyrairikar Have you tried the same with any other 5.1 preset. Let me know that happens then . Also you may want to check if the Digital Connections are synced .