[LAU] JACK: more on inputs and outputs

[Andrew Bryant]

I think this must be a quirk of the hardware: onboard Intel 
82801BA-ICH2, chip AD1885

Jackd running, meterbridge connected to alsa_pcm:capture_1 and _2

Everything on alsamixer un-muted and faded up (except the 20db mic gain).

Signal plugged to the mic input appears both on the meters, and on the 
h/p jack

Signal plugged to the line jack appears at the h/p jack, but not on the 
meters.

I find this baffling.

Andrew.