I have the Bifrost and have the clicking problem. The connection is coax from CD player.
It occurs between tracks. The player is also a 6 disc carousel and it will click continuously
if I hit pause - and doesn't stop until I resume play. I was in contact with Jason Stoddard
at Schiit and here's what he said...
"Yep, if the CD player interrupts the data stream, Bifrost will click. That's the muting relay, doing its job."
" Bifrost's mute activates every time there's an interruption in the data stream. Some CD players have constant, repetitive interruption when in pause. The only real solution is to use a different player or computer source, I'm afraid."
So, what seems like a real design flaw is apparently 'Working As Designed'.
I agree - those CD player manufacturers should really get their act together!