root@dm920:~$ ls -1 /proc/stb/audio
aac
aac_choices
ac3
ac3_choices
ac3plus
ac3plus_choices
audio_delay_bitstream
audio_delay_pcm
dtshd
dtshd_choices
force_hdmi_audio_disable
hdmi_rx_monitor
hdmi_rx_monitor_choices
pcr_offset_aac
pcr_offset_aache
pcr_offset_ac3
pcr_offset_ac3plus
pcr_offset_mpeg
pts_offset
wmapro
wmapro_choices