Probléme de virtualisation du son

Bonjour,

Sur une machine guest (Win7), j'ai des probléme au niveau de la virtualisation de la carte son.
Windows 7 se fige (de 5 à 15 secondes) à chaque appel d'envoie du son vers l'hote,
un autre soucis : le son sort de mes baffles de 10 à 30 secondes aprés.

Pour info : Pour cette machine guest J'ai configurer le port paralléle pour pouvoir accéder à mon imprimante relié par cable paralléle.

Pendant ce temps je vais le tester sur une autre machine guest Windows 7.

Merci de me donner des tuyaux ?

Machine Hote : Ubuntu 10.04
Machine Guest : Windows 7 (x86)

Donnée de ma machine guest :
Code:
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<?xml version="1.0"?>
<!--
** DO NOT EDIT THIS FILE.
** If you make changes to this file while any VirtualBox related application
** is running, your changes will be overwritten later, without taking effect.
** Use VBoxManage or the VirtualBox Manager GUI to make changes.
-->
<VirtualBox xmlns="http://www.innotek.de/VirtualBox-settings" version="1.11-linux">
  <Machine uuid="{9b896cb2-c57a-4884-a2b8-230d83d1d015}" name="Mon Work (x86)" OSType="Windows7" snapshotFolder="Snapshots" lastStateChange="2011-06-02T17:35:59Z">
    <MediaRegistry>
      <HardDisks>
        <HardDisk uuid="{7f9ca42a-c08a-458e-9b3f-e5d37ad807ef}" location="/media/Data/store/work/work.vmdk" format="VMDK" type="Normal"/>
        <HardDisk uuid="{e40aaef6-c38b-4018-ab83-e8dca829b5d5}" location="/media/Data/mywork2/mon soft (windows 7).vmdk" format="VMDK" type="Normal"/>
        <HardDisk uuid="{7a9b09ec-5750-4a07-9eca-4409f4837816}" location="/media/Data/mywork2/data-ext.vmdk" format="VMDK" type="Normal"/>
        <HardDisk uuid="{29f4ecb1-1033-4c2a-ba03-3b5a44133d53}" location="/media/Data/mywork2/data-ext-backup.vmdk" format="VMDK" type="Normal"/>
        <HardDisk uuid="{aeb3db98-d6c7-421d-8dbe-508d15921097}" location="/media/Data/mywork2/i.marche.vdi.vdi" format="VDI" type="Normal"/>
        <HardDisk uuid="{23961047-82e6-49f5-a0de-7fabf68ea160}" location="/media/Data/mywork2/Mov Work (windows 7) (copie).vmdk" format="VMDK" type="Normal"/>
      </HardDisks>
      <DVDImages>
        <Image uuid="{7bcf8a4a-d2b8-4416-b7e6-b02bd3f47ae8}" location="/media/Data/iso/Borland C++ Builder 2009.iso"/>
        <Image uuid="{e570c27c-9e4d-431c-bf38-17e207259fa6}" location="/media/Data/iso/Windows7_x86.iso"/>
        <Image uuid="{a078e15e-d65d-4f76-9891-fff3d1de2311}" location="/media/Data/iso/nulcd.iso"/>
        <Image uuid="{7e8a57fe-456c-4ddf-b550-e59b3e88aad7}" location="/media/Data/iso/nulcd (copie).iso"/>
      </DVDImages>
      <FloppyImages/>
    </MediaRegistry>
    <ExtraData>
      <ExtraDataItem name="GUI/Fullscreen" value="on"/>
      <ExtraDataItem name="GUI/InfoDlgState" value="400,450,normal"/>
      <ExtraDataItem name="GUI/LastCloseAction" value="save"/>
      <ExtraDataItem name="GUI/LastGuestSizeHint" value="1678,925"/>
      <ExtraDataItem name="GUI/LastGuestSizeHint1" value="1678,925"/>
      <ExtraDataItem name="GUI/LastNormalWindowPosition" value="1,51,1678,970"/>
      <ExtraDataItem name="GUI/LastNormalWindowPosition1" value="1,51,1678,970"/>
      <ExtraDataItem name="GUI/MiniToolBarAlignment" value="top"/>
      <ExtraDataItem name="GUI/SaveMountedAtRuntime" value="yes"/>
      <ExtraDataItem name="GUI/ShowMiniToolBar" value="yes"/>
      <ExtraDataItem name="GUI/VirtualScreenToHostScreen0" value="1"/>
      <ExtraDataItem name="GUI/VirtualScreenToHostScreen1" value="0"/>
      <ExtraDataItem name="VBoxInternal/Devices/parallel/0/Config/IOBase" value="0x378"/>
      <ExtraDataItem name="VBoxInternal/Devices/parallel/0/Config/IRQ" value="4"/>
      <ExtraDataItem name="VBoxInternal/Devices/parallel/0/LUN#0/Config/DevicePath" value="/dev/parport0"/>
      <ExtraDataItem name="VBoxInternal/Devices/parallel/0/LUN#0/Driver" value="HostParallel"/>
    </ExtraData>
    <Hardware version="2">
      <CPU count="1" hotplug="false">
        <HardwareVirtEx enabled="true" exclusive="true"/>
        <HardwareVirtExNestedPaging enabled="true"/>
        <HardwareVirtExVPID enabled="true"/>
        <PAE enabled="true"/>
        <HardwareVirtExLargePages enabled="false"/>
        <HardwareVirtForce enabled="false"/>
      </CPU>
      <Memory RAMSize="1200" PageFusion="false"/>
      <HID Pointing="PS2Mouse" Keyboard="PS2Keyboard"/>
      <HPET enabled="false"/>
      <Chipset type="ICH9"/>
      <Boot>
        <Order position="1" device="Floppy"/>
        <Order position="2" device="DVD"/>
        <Order position="3" device="HardDisk"/>
        <Order position="4" device="None"/>
      </Boot>
      <Display VRAMSize="96" monitorCount="2" accelerate3D="true" accelerate2DVideo="true"/>
      <RemoteDisplay enabled="false" authType="Null" authTimeout="5000"/>
      <BIOS>
        <ACPI enabled="true"/>
        <IOAPIC enabled="true"/>
        <Logo fadeIn="true" fadeOut="true" displayTime="0"/>
        <BootMenu mode="MessageAndMenu"/>
        <TimeOffset value="0"/>
        <PXEDebug enabled="false"/>
      </BIOS>
      <USBController enabled="true" enabledEhci="true"/>
      <Network>
        <Adapter slot="0" enabled="true" MACAddress="080027AD9A62" cable="false" speed="0" type="82540EM">
          <NAT>
            <DNS pass-domain="true" use-proxy="false" use-host-resolver="false"/>
            <Alias logging="false" proxy-only="false" use-same-ports="false"/>
          </NAT>
        </Adapter>
        <Adapter slot="1" enabled="false" MACAddress="080027F0A1D0" cable="true" speed="0" type="82540EM">
          <DisabledModes>
            <NAT>
              <DNS pass-domain="true" use-proxy="false" use-host-resolver="false"/>
              <Alias logging="false" proxy-only="false" use-same-ports="false"/>
            </NAT>
          </DisabledModes>
        </Adapter>
        <Adapter slot="2" enabled="false" MACAddress="080027384BAF" cable="true" speed="0" type="82540EM">
          <DisabledModes>
            <NAT>
              <DNS pass-domain="true" use-proxy="false" use-host-resolver="false"/>
              <Alias logging="false" proxy-only="false" use-same-ports="false"/>
            </NAT>
          </DisabledModes>
        </Adapter>
        <Adapter slot="3" enabled="false" MACAddress="080027E1DEB8" cable="true" speed="0" type="82540EM">
          <DisabledModes>
            <NAT>
              <DNS pass-domain="true" use-proxy="false" use-host-resolver="false"/>
              <Alias logging="false" proxy-only="false" use-same-ports="false"/>
            </NAT>
          </DisabledModes>
        </Adapter>
        <Adapter slot="4" enabled="false" MACAddress="080027CF6445" cable="true" speed="0" type="82540EM">
          <DisabledModes>
            <NAT>
              <DNS pass-domain="true" use-proxy="false" use-host-resolver="false"/>
              <Alias logging="false" proxy-only="false" use-same-ports="false"/>
            </NAT>
          </DisabledModes>
        </Adapter>
        <Adapter slot="5" enabled="false" MACAddress="080027EA94BC" cable="true" speed="0" type="82540EM">
          <DisabledModes>
            <NAT>
              <DNS pass-domain="true" use-proxy="false" use-host-resolver="false"/>
              <Alias logging="false" proxy-only="false" use-same-ports="false"/>
            </NAT>
          </DisabledModes>
        </Adapter>
        <Adapter slot="6" enabled="false" MACAddress="080027A3A7F4" cable="true" speed="0" type="82540EM">
          <DisabledModes>
            <NAT>
              <DNS pass-domain="true" use-proxy="false" use-host-resolver="false"/>
              <Alias logging="false" proxy-only="false" use-same-ports="false"/>
            </NAT>
          </DisabledModes>
        </Adapter>
        <Adapter slot="7" enabled="false" MACAddress="0800273D4DD7" cable="true" speed="0" type="82540EM">
          <DisabledModes>
            <NAT>
              <DNS pass-domain="true" use-proxy="false" use-host-resolver="false"/>
              <Alias logging="false" proxy-only="false" use-same-ports="false"/>
            </NAT>
          </DisabledModes>
        </Adapter>
      </Network>
      <UART>
        <Port slot="0" enabled="false" IOBase="0x3f8" IRQ="4" server="false" path="kki" hostMode="HostPipe"/>
        <Port slot="1" enabled="false" IOBase="0x2f8" IRQ="3" hostMode="Disconnected"/>
      </UART>
      <LPT>
        <Port slot="0" enabled="false" IOBase="0x378" IRQ="4"/>
        <Port slot="1" enabled="false" IOBase="0x378" IRQ="4"/>
      </LPT>
      <AudioAdapter controller="AC97" driver="Pulse" enabled="true"/>
      <RTC localOrUTC="local"/>
      <SharedFolders>
        <SharedFolder name="cs" hostPath="/home/yanno/cs" writable="true" autoMount="false"/>
        <SharedFolder name="Dropbox" hostPath="/home/yanno/Dropbox" writable="true" autoMount="false"/>
        <SharedFolder name="lbin" hostPath="/home/yanno/cs/lbin" writable="true" autoMount="false"/>
        <SharedFolder name="ndatarw" hostPath="/home/yanno/ndatarw" writable="true" autoMount="false"/>
        <SharedFolder name="tmpdata" hostPath="/media/Data/tmp" writable="true" autoMount="false"/>
      </SharedFolders>
      <Clipboard mode="Bidirectional"/>
      <IO>
        <IoCache enabled="true" size="5"/>
        <BandwidthGroups/>
      </IO>
      <Guest memoryBalloonSize="0"/>
      <GuestProperties>
        <GuestProperty name="/VirtualBox/HostInfo/GUI/LanguageID" value="fr_FR" timestamp="1306451375859269000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestInfo/OS/Product" value="Windows 7" timestamp="1307034513199463000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestInfo/OS/Release" value="6.1.7600" timestamp="1307034513200184000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestInfo/OS/Version" value="" timestamp="1307034513200659000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestInfo/OS/ServicePack" value="" timestamp="1307034513200991000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestAdd/Version" value="4.0.6" timestamp="1307034513201330000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestAdd/Revision" value="71344" timestamp="1307034513201596000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestAdd/InstallDir" value="C:/Program Files/Oracle/VirtualBox Guest Additions" timestamp="1307034513201895000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxControl.exe" value="4.0.6r71344" timestamp="1307034513204646000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxHook.dll" value="4.0.6r71344" timestamp="1307034513207612000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxDisp.dll" value="4.0.6r71344" timestamp="1307034513209333000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxMRXNP.dll" value="4.0.6r71344" timestamp="1307034513211145000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxService.exe" value="4.0.6r71344" timestamp="1307034513212015000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxTray.exe" value="4.0.6r71344" timestamp="1307034513214496000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxGINA.dll" value="-" timestamp="1307034513214987000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxCredProv.dll" value="-" timestamp="1307034513215405000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxOGLarrayspu.dll" value="4.0.6r71344" timestamp="1307034513217522000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxOGLcrutil.dll" value="4.0.6r71344" timestamp="1307034513219306000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxOGLerrorspu.dll" value="4.0.6r71344" timestamp="1307034513221423000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxOGLpackspu.dll" value="4.0.6r71344" timestamp="1307034513252244000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxOGLpassthroughspu.dll" value="4.0.6r71344" timestamp="1307034513254072000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxOGLfeedbackspu.dll" value="4.0.6r71344" timestamp="1307034513260148000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxOGL.dll" value="4.0.6r71344" timestamp="1307034513262136000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxGuest.sys" value="4.0.6r71344" timestamp="1307034513264861000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxMouse.sys" value="4.0.6r71344" timestamp="1307034513267279000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxSF.sys" value="4.0.6r71344" timestamp="1307034513270434000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestAdd/Components/VBoxVideo.sys" value="4.0.6r71344" timestamp="1307034513271797000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestAdd/HostVerLastChecked" value="4.0.8" timestamp="1307034764593604000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestInfo/Net/0/MAC" value="" timestamp="1307036153795266000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestInfo/Net/0/V4/IP" value="" timestamp="1307036153795740000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestInfo/Net/0/V4/Broadcast" value="" timestamp="1307036153796016000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestInfo/Net/0/V4/Netmask" value="" timestamp="1307036153796443000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestInfo/Net/0/Status" value="" timestamp="1307036153796691000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestInfo/Net/Count" value="" timestamp="1307036153797014000" flags=""/>
        <GuestProperty name="/VirtualBox/GuestInfo/OS/LoggedInUsersList" value="" timestamp="1307036153797683000" flags=""/>
      </GuestProperties>
    </Hardware>
    <StorageControllers>
      <StorageController name="Contr&#xF4;leur IDE" type="PIIX4" PortCount="2" useHostIOCache="true" Bootable="true">
        <AttachedDevice passthrough="false" type="DVD" port="0" device="0">
          <Image uuid="{a078e15e-d65d-4f76-9891-fff3d1de2311}"/>
        </AttachedDevice>
        <AttachedDevice passthrough="false" type="DVD" port="1" device="0">
          <Image uuid="{7e8a57fe-456c-4ddf-b550-e59b3e88aad7}"/>
        </AttachedDevice>
      </StorageController>
      <StorageController name="Contr&#xF4;leur SCSI" type="LsiLogic" PortCount="16" useHostIOCache="true" Bootable="true">
        <AttachedDevice type="HardDisk" port="0" device="0">
          <Image uuid="{23961047-82e6-49f5-a0de-7fabf68ea160}"/>
        </AttachedDevice>
        <AttachedDevice type="HardDisk" port="1" device="0">
          <Image uuid="{e40aaef6-c38b-4018-ab83-e8dca829b5d5}"/>
        </AttachedDevice>
        <AttachedDevice type="HardDisk" port="2" device="0">
          <Image uuid="{7f9ca42a-c08a-458e-9b3f-e5d37ad807ef}"/>
        </AttachedDevice>
        <AttachedDevice type="HardDisk" port="3" device="0">
          <Image uuid="{aeb3db98-d6c7-421d-8dbe-508d15921097}"/>
        </AttachedDevice>
        <AttachedDevice type="HardDisk" port="5" device="0">
          <Image uuid="{29f4ecb1-1033-4c2a-ba03-3b5a44133d53}"/>
        </AttachedDevice>
        <AttachedDevice type="HardDisk" port="15" device="0">
          <Image uuid="{7a9b09ec-5750-4a07-9eca-4409f4837816}"/>
        </AttachedDevice>
      </StorageController>
    </StorageControllers>
  </Machine>
</VirtualBox>