Pulseaudio и две карты, как выбрать карту из командной строки?

Воспользовался инструкцией от pygrubhttps://wiki.debian.org/PyGrub

# inside the vm:
mkdir /boot/grub
apt-get install -y linux-image-amd64
cat > /boot/grub/menu.lst << EOF

default         0
timeout         2

title           Debian GNU/Linux
root            (hd0,0)
kernel          /vmlinuz root=/dev/xvda2 ro
initrd          /initrd.img

title           Debian GNU/Linux (recovery mode)
root            (hd0,0)
kernel          /vmlinuz root=/dev/xvda2 ro single
initrd          /initrd.img

EOF

halt
# in dom0: check with 
#xl shutdown VMID

#check grub with
/usr/lib/xen-4.6/bin/pygrub /dev/vg0/vm02.freifunk-disk   

nano /etc/xen/vm02.freifunk.cfg             
# remove this line: 
#kernel      = '/boot/vmlinuz-4.3.0-1-amd64'
kernel      = '/boot/vmlinuz-3.16.0-4-amd64'
bootloader  = '/usr/lib/xen-4.6/bin/pygrub'
extra       = 'elevator=noop'
# remove this line: 
#ramdisk     = '/boot/initrd.img-4.3.0-1-amd64'
ramdisk     = '/boot/initrd.img-3.16.0-4-amd64'


xen create /etc/xen/vm02.freifunk.cfg