sound too quiet

[Steven Lumos]

I have a Shuttle SN41G2 with nForce2.  Volume control does effectively
change the volume, but the max volume is way too quiet.  It's just
barely audible through speakers, and not quite loud enough through
earphones.  In the archive, most problems seem to be too loud instead
of too quiet....  I'm hoping there's some hack I can install to make
it work for me even if it would make things too loud for others.

Info follows.  Thanks.

Steve

# uname -a
FreeBSD bitty.lumos.us 6.2-RELEASE FreeBSD 6.2-RELEASE #0: Fri Feb  2
00:54:34 PST 2007     root at bitty.lumos.us:/usr/obj/usr/src/sys/BITTY
i386
# pciconf -lv | grep -B 4 audio
none6 at pci0:5:0: class=0x040100 card=0xf5411297 chip=0x006b10de rev=0xa2 hdr=0x00
    vendor   = 'NVIDIA Corporation'
    device   = 'nForce MCP-T? Audio Processing Unit (Dolby Digital)'
    class    = multimedia
    subclass = audio
pcm0 at pci0:6:0:  class=0x040100 card=0xf5411297 chip=0x006a10de rev=0xa1 hdr=0x00
    vendor   = 'NVIDIA Corporation'
    device   = 'nForce MCP-T Audio Codec Interface'
    class    = multimedia
    subclass = audio
# dmesg | grep ^pcm
pcm0: <nVidia nForce2> port 0xd400-0xd4ff,0xd800-0xd87f mem
0xe4081000-0xe4081fff irq 22 at device 6.0 on pci0
pcm0: <Avance Logic ALC650 AC97 Codec>
pcm0: detached
pcm0: <nVidia nForce2> port 0xd400-0xd4ff,0xd800-0xd87f mem
0xe4081000-0xe4081fff irq 22 at device 6.0 on pci0
pcm0: <Avance Logic ALC650 AC97 Codec>
pcm0: detached
pcm0: <nVidia nForce2> port 0xd400-0xd4ff,0xd800-0xd87f mem
0xe4081000-0xe4081fff irq 22 at device 6.0 on pci0
pcm0: <Avance Logic ALC650 AC97 Codec>
pcm0: detached
pcm0: <nVidia nForce2> port 0xd400-0xd4ff,0xd800-0xd87f mem
0xe4081000-0xe4081fff irq 22 at device 6.0 on pci0
pcm0: <Avance Logic ALC650 AC97 Codec>
pcm0: detached
pcm0: <nVidia nForce2> port 0xd400-0xd4ff,0xd800-0xd87f mem
0xe4081000-0xe4081fff irq 22 at device 6.0 on pci0
pcm0: [MPSAFE]
pcm0: <Avance Logic ALC650 AC97 Codec (id = 0x414c4720)>
pcm0: Codec features 20 bit DAC, 18 bit ADC, 5 bit master volume,
Realtek 3D Stereo Enhancement
pcm0: Primary codec extended features variable rate PCM, double rate
PCM, reserved 1, center DAC, surround DAC, LFE DAC, reserved 4
pcm0: ac97 codec dac ready count: 0
pcm0: sndbuf_setmap 756bd000, 4000; 0xea180000 -> 756bd000
pcm0: sndbuf_setmap 756b9000, 4000; 0xea184000 -> 756b9000
pcm0: measured ac97 link rate at 48001 Hz, will use 48000 Hz
# sysctl hw.snd.verbose=2; cat /dev/sndstat
hw.snd.verbose: 1 -> 2
FreeBSD Audio Driver (newpcm)
Installed devices:
pcm0: <nVidia nForce2> at io 0xd400, 0xd800 irq 22 bufsz 16384 kld
snd_ich (1p/1r/0v channels duplex default)
        [pcm0:play:0:dsp0.0]: spd 0, fmt 0x00000000/0x00000008, flags
0x00000000, 0x00000000
        interrupts 0, underruns 0, ready 0 [b:16384/8192/2|bs:0/0/0]
        {userland} -> feeder_root(0x00000000) -> {hardware}
        [pcm0:record:0:dsp0.1]: spd 0, fmt 0x00000000/0x00000008,
flags 0x00000000, 0x00000000
        interrupts 0, overruns 0, hfree 16384, sfree 0 [b:16384/8192/2|bs:0/0/0]
        {hardware} -> feeder_root(0x00000000) -> {userland}
# sysctl hw.snd
hw.snd.report_soft_formats: 1
hw.snd.targetirqrate: 32
hw.snd.verbose: 2
hw.snd.maxautovchans: 0
hw.snd.unit: 0
hw.snd.pcm0.buffersize: 16384
hw.snd.pcm0.vchans: 0
hw.snd.pcm0.ac97rate: 48000
# /usr/sbin/mixer
Mixer vol      is currently set to  75:75
Mixer pcm      is currently set to  75:75
Mixer speaker  is currently set to  75:75
Mixer line     is currently set to  75:75
Mixer mic      is currently set to   0:0
Mixer cd       is currently set to  75:75
Mixer rec      is currently set to   0:0
Mixer igain    is currently set to   0:0
Mixer ogain    is currently set to  50:50
Mixer line1    is currently set to  75:75
Mixer phin     is currently set to   0:0
Mixer phout    is currently set to   0:0
Mixer video    is currently set to  75:75
Recording source: mic