[CUBOX] Sound over HDMI?

Hi

First Thanks for the work. Volumio looks very good,
My problem is that I don´t can select HDMI Audio output. Is there any solution for this problem.

aplay -l also does not show a hdmi

root@volumio:~# aplay -l **** List of PLAYBACK Hardware Devices **** card 0: SPDIF [Kirkwood SPDIF], device 0: IEC958 Playback dit-hifi-0 [] Subdevices: 1/1 Subdevice #0: subdevice #0
aplay -L

root@volumio:~# aplay -L null Discard all samples (playback) or generate zero samples (capture) default:CARD=SPDIF Kirkwood SPDIF, Default Audio Device sysdefault:CARD=SPDIF Kirkwood SPDIF, Default Audio Device
dmesg | grep hdmi

root@volumio:~# dmesg | grep hdmi hdmicec(tda19989) 1.3.0 compiled: Dec 12 2013 19:46:19 -ioctl (2009-10-15) hdmicec:cec_init:.verbose mode hdmicec:this_i2c_probe:called hdmicec:this_i2c_probe:HDMI CEC SW Version:1.4 compatibility:0 hdmicec declared as a playback device type hdmicec:cec_standby:on --> standby hdmitx(tda19989) 1.3.0 compiled: Dec 12 2013 19:46:21 -ioctl (2009-10-15) hdmi HPD inactive hdmi Rx device inactive hdmi HPD active hdmi Rx device active hdmi EDID received