JACK Meter 0.3

Jack Meter is a basic console based DPM (Digital Peak Meter) for JACK. I wrote it for quickly checking remote signal levels, without having to run X11 to use a pretty graphical meter such as meterbridge.
Usage
Usage jack_meter [-f freqency] [-r ref-level] [-w width] [-n] [< port >, ...]
where -f is how often to update the meter per second (8)
-r is the reference signal level for 0dB on the meter
-w is how wide to make the meter (79)
-n changes mode to output meter level as number in decibels
< port > the ports to monitor (multiple ports are mixed)
Enhancements:
- uses new JACK API (and hence requires JACK version 0.100.0)
- connects multiple ports on the command line
- informational messages are new sent to STDERR
- added -n option to output level as number in decibels