Spice for graphic, pulseaudio for sound

When we use Spice in a virtual machine under KVM/qemu/libvirt, the QEMU_AUDIO_DRV is set to spice by default. My host (debian-Stretch) use a good sound card (Xonar DX) and a better sound driver (pulseaudio,alsa). How to use in a virtual machine spice for the graphic aspect and pulseaudio or alsa for the sound aspect (whatever the guest OS) ? **Note 1**: in the domain.xml, I added: Now, in domain.log, I see: QEMU_AUDIO_DRV=pa QEMU_PA_SERVER=/run/user/1000/pulse/native Well but I don't know if my guest uses pulseaudio or not because domain.xml has the following section: **Note 2**: other try: No sound.