On Thu, Dec 22, 2016 at 02:32:29PM -0500, Tobiasz KaroĊ wrote:
  A few days ago, suddenly I was unable to play or
record anything.
 I found out that I can use my soundcards in Ardour only if I use ALSA as a
 backend - not JACK.
 Running JACK with 3 different audio interfaces everytime spawns 32 in / 32
 out channels in the "System" JACK hardware clients - and none of that works.
What do you see in /proc/asound?
John