Disable monitor recording source

[David Demelier]

Hello,

I would like to record only from mic but I can't remove monitor from
recording :

markand at Melon ~ $ cat /dev/sndstat
FreeBSD Audio Driver (newpcm: 64bit 2009061500/amd64)
Installed devices:
pcm0: <ATI R6xx (HDMI)> (play)
pcm1: <Analog Devices AD1984A (Analog 2.0+HP/3.1)> (play/rec) default
markand at Melon ~ $ mixer
Mixer vol      is currently set to  90:90
Mixer pcm      is currently set to  90:90
Mixer speaker  is currently set to   0:0
Mixer mic      is currently set to  90:90
Mixer rec      is currently set to  80:80
Mixer igain    is currently set to   0:0
Mixer ogain    is currently set to 100:100
Mixer monitor  is currently set to  80:80
Recording source: mic, monitor
markand at Melon ~ $ mixer -rec monitor
Recording source: mic, monitor
markand at Melon ~ $

What I'm doing wrong?

Cheers,