VLC plays DTS surround but not AAC

[zipdox]

I'm trying to get VLC to play AAC 5.1 surround encoded MKV's but it just plays through stereo. I have confirmed it does work with some DTS test file I downloaded. I'm on linux with SPDIF output using ALSA output over Playback through PulseAudio. Does VLC even support AAC surround?

[Rémi Denis-Courmont]

I don't think PulseAudio even supports AAC surround.