Carte son incontrolable

Bonjour! Ma carte son "SiS7012" integrée a une carte mére fonctionnent
en tout ou rien, le volume est incontrolable, 0 ou 100%. De plus il
semble que de temps en temps les paquets d'echantillons sortent un peu
plus vite ce qui donne l'impression d'une avance rapide avec un pas trés
fin.



--
lspci + /etc/asound.state

00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS]
SiS7012 PCI Audio Accelerator (rev a0)
Subsystem: Unknown device 1849:7012
Flags: bus master, medium devsel, latency 32, IRQ 10
I/O ports at dc00 [size=256]
I/O ports at d800 [size=128]
Capabilities: [48] Power Management version 2


state.SI7012 {
control.1 {
comment.access 'read write'
comment.type BOOLEAN
iface MIXER
name 'Master Playback Switch'
value true
}
control.2 {
comment.access 'read write'
comment.type INTEGER
comment.range '0 - 31'
iface MIXER
name 'Master Playback Volume'
value.0 19
value.1 19
}
control.3 {
comment.access 'read write'
comment.type BOOLEAN
iface MIXER
name 'Center Playback Switch'
value false
}
control.4 {
comment.access 'read write'
comment.type INTEGER
comment.range '0 - 31'
iface MIXER
name 'Center Playback Volume'
value 31
}
control.5 {
comment.access 'read write'
comment.type BOOLEAN
iface MIXER
name 'LFE Playback Switch'
value false
}
control.6 {
comment.access 'read write'
comment.type INTEGER
comment.range '0 - 31'
iface MIXER
name 'LFE Playback Volume'
value 2
}
control.7 {
comment.access 'read write'
comment.type BOOLEAN
iface MIXER
name 'Surround Playback Switch'
value.0 false
value.1 false
}
control.8 {
comment.access 'read write'
comment.type INTEGER
comment.range '0 - 31'
iface MIXER
name 'Surround Playback Volume'
value.0 0
value.1 0
}
control.9 {
comment.access 'read write'
comment.type BOOLEAN
iface MIXER
name 'PC Speaker Playback Switch'
value false
}
control.10 {
comment.access 'read write'
comment.type INTEGER
comment.range '0 - 15'
iface MIXER
name 'PC Speaker Playback Volume'
value 0
}
control.11 {
comment.access 'read write'
comment.type BOOLEAN
iface MIXER
name 'Mic Playback Switch'
value false
}
control.12 {
comment.access 'read write'
comment.type INTEGER
comment.range '0 - 31'
iface MIXER
name 'Mic Playback Volume'
value 0
}
control.13 {
comment.access 'read write'
comment.type BOOLEAN
iface MIXER
name 'Mic Boost (+20dB)'
value false
}
control.14 {
comment.access 'read write'
comment.type BOOLEAN
iface MIXER
name 'Line Playback Switch'
value false
}
control.15 {
comment.access 'read write'
comment.type INTEGER
comment.range '0 - 31'
iface MIXER
name 'Line Playback Volume'
value.0 4
value.1 4
}
control.16 {
comment.access 'read write'
comment.type BOOLEAN
iface MIXER
name 'CD Playback Switch'
value false
}
control.17 {
comment.access 'read write'
comment.type INTEGER
comment.range '0 - 31'
iface MIXER
name 'CD Playback Volume'
value.0 0
value.1 0
}
control.18 {
comment.access 'read write'
comment.type BOOLEAN
iface MIXER
name 'Video Playback Switch'
value false
}
control.19 {
comment.access 'read write'
comment.type INTEGER
comment.range '0 - 31'
iface MIXER
name 'Video Playback Volume'
value.0 0
value.1 0
}
control.20 {
comment.access 'read write'
comment.type BOOLEAN
iface MIXER
name 'Aux Playback Switch'
value true
}
control.21 {
comment.access 'read write'
comment.type INTEGER
comment.range '0 - 31'
iface MIXER
name 'Aux Playback Volume'
value.0 18
value.1 18
}
control.22 {
comment.access 'read write'
comment.type BOOLEAN
iface MIXER
name 'PCM Playback Switch'
value true
}
control.23 {
comment.access 'read write'
comment.type INTEGER
comment.range '0 - 31'
iface MIXER
name 'PCM Playback Volume'
value.0 18
value.1 18
} control.24 {
comment.access 'read write'
comment.type ENUMERATED
comment.item.0 Mic
comment.item.1 CD
comment.item.2 Video
comment.item.3 Aux
comment.item.4 Line
comment.item.5 Mix
comment.item.6 'Mix Mono'
comment.item.7 Phone
iface MIXER
name 'Capture Source'
value.0 Mic
value.1 Mic
}
control.25 {
comment.access 'read write'
comment.type BOOLEAN
iface MIXER
name 'Capture Switch'
value true
}
control.26 {
comment.access 'read write'
comment.type INTEGER
comment.range '0 - 15'
iface MIXER
name 'Capture Volume'
value.0 0
value.1 0
}
control.27 {
comment.access 'read write'
comment.type ENUMERATED
comment.item.0 Mix
comment.item.1 Mic
iface MIXER
name 'Mono Output Select'
value Mix
}
control.28 {
comment.access 'read write'
comment.type ENUMERATED
comment.item.0 Mic1
comment.item.1 Mic2
iface MIXER
name 'Mic Select'
value Mic1
}
control.29 {
comment.access 'read write'
comment.type BOOLEAN
iface MIXER
name 'External Amplifier Power Down'
value false
}
}