> why does "jackd -d alsa -d hw" work > and "jackd -d alsa -d hw:0" work > but "jackd -d alsa -d hw:0,0" give me -> I *think* that hw:0,0 specifies the first PCM device on the first card. Jack just deals with cards as a whole, so "hw:0" specifies the first card, "hw" obviously defaults to the first card, and "hw:0,0" specifies something that isn't a card, which is why jackd barfs. Bob