+ <item level="1" text="Dolby Digital / DTS downmix" requires="CanDownmixAC3" entrychange="yes">config.av.downmix_ac3</item>
+ <item level="1" text="PCM Multichannel" requires="CanPcmMultichannel">config.av.pcm_multichannel</item>
+ <item level="1" text="AAC downmix" requires="CanDownmixAAC">config.av.downmix_aac</item>