On latest Hijack, which is known to have tuner/radio issues, I get this output:

EMPEG_MIXER_READ_SIGNAL_STRENGTH = 0
EMPEG_MIXER_READ_SIGNAL_STEREO = 262143
EMPEG_MIXER_READ_SIGNAL_NOISE = 1
EMPEG_MIXER_READ_SIGNAL_MULTIPATH = 1
EMPEG_MIXER_READ_SIGNAL_STRENGTH_FAST = 0