How to add sound devices

Hello,

i use kodi with a usb sound card and alsa on my rpi2 with a debian dinux (xbian).

i works well but in Kodi i can ony choose between 2 sound-devices from the usb-soundcard:
ALSA:USB default
ALSA:USB surround21

but my alsa or my usb-soudnkart have a lot more:

Code:
xbian@RPi2 ~ $ aplay -L
null
   Discard all samples (playback) or generate zero samples (capture)
upmix_20to51
lowpass_21to21
upmix_21to51
sysdefault:CARD=ALSA
   bcm2835 ALSA, bcm2835 ALSA
   Default Audio Device
dmix:CARD=ALSA,DEV=0
   bcm2835 ALSA, bcm2835 ALSA
   Direct sample mixing device
dmix:CARD=ALSA,DEV=1
   bcm2835 ALSA, bcm2835 IEC958/HDMI
   Direct sample mixing device
dsnoop:CARD=ALSA,DEV=0
   bcm2835 ALSA, bcm2835 ALSA
   Direct sample snooping device
dsnoop:CARD=ALSA,DEV=1
   bcm2835 ALSA, bcm2835 IEC958/HDMI
   Direct sample snooping device
hw:CARD=ALSA,DEV=0
   bcm2835 ALSA, bcm2835 ALSA
   Direct hardware device without any conversions
hw:CARD=ALSA,DEV=1
   bcm2835 ALSA, bcm2835 IEC958/HDMI
   Direct hardware device without any conversions
plughw:CARD=ALSA,DEV=0
   bcm2835 ALSA, bcm2835 ALSA
   Hardware device with all software conversions
plughw:CARD=ALSA,DEV=1
   bcm2835 ALSA, bcm2835 IEC958/HDMI
   Hardware device with all software conversions
sysdefault:CARD=Device
   USB Sound Device, USB Audio
   Default Audio Device
front:CARD=Device,DEV=0
   USB Sound Device, USB Audio
   Front speakers
surround21:CARD=Device,DEV=0
   USB Sound Device, USB Audio
   2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=Device,DEV=0
   USB Sound Device, USB Audio
   4.0 Surround output to Front and Rear speakers
surround41:CARD=Device,DEV=0
   USB Sound Device, USB Audio
   4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=Device,DEV=0
   USB Sound Device, USB Audio
   5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=Device,DEV=0
   USB Sound Device, USB Audio
   5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=Device,DEV=0
   USB Sound Device, USB Audio
   7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=Device,DEV=0
   USB Sound Device, USB Audio
   IEC958 (S/PDIF) Digital Audio Output
dmix:CARD=Device,DEV=0
   USB Sound Device, USB Audio
   Direct sample mixing device
dsnoop:CARD=Device,DEV=0
   USB Sound Device, USB Audio
   Direct sample snooping device
hw:CARD=Device,DEV=0
   USB Sound Device, USB Audio
   Direct hardware device without any conversions
plughw:CARD=Device,DEV=0
   USB Sound Device, USB Audio
   Hardware device with all software conversions

also i´ve created with alsa a virtual device (upmix_20to51) with a low-pass filter for the sub.out of my usb-soundcard witch i would like to use it.

so is it possible to add more of my devices to Kodi?

Greetings,
H.