5.1 Sound not working with X-FI 5.1 USB on rPI3

Hi,

I have a problem with LibreELEC 7.0.2 on my rPI3 that has Sound Blaster X-Fi Surround 5.1 Pro USB connected to it. When I switch from 2.0 to 5.1 there is no sound for movies with AC3. This works ok with OpenELEC 6.0.3. I use analog connection from USB card to Logitech 5.1 speakers. When it is set to 2.0 it works. How can I fix this to use 5.1 surround sound like on OpenELEC 6.0.3?

I currently have OpenELEC installed but my settings were (same as OpenELEC):

Audio output device: Creative X-FI 5.1 Pro (ALSA:@:CARD=Pro,DEV=0) analog
Number of channels: 5.1
Output configuration: Optimized
Stereo upmix: un-checked
Normalize levels on downmix: checked
Resample quality: High
Keep audio device alive: 1 Minute
Play GUI sounds: Always
Enable passthrough: un-ticked

Settings are default, the only thing that I changed was "Audio output device -> Creative X-Fi analog" and "Number of channels -> 5.1", but this worked for me on OpenELEC.

This settings are from OpenELEC:

<audiooutput>
<ac3passthrough default="true">true</ac3passthrough>
<ac3transcode default="true">false</ac3transcode>
<audiodevice>ALSA:@:CARD=Pro,DEV=0</audiodevice>
<boostcenter default="true">0</boostcenter>
<channels>8</channels>
<config default="true">2</config>
<dtshdpassthrough default="true">false</dtshdpassthrough>
<dtspassthrough default="true">false</dtspassthrough>
<eac3passthrough default="true">false</eac3passthrough>
<guisoundmode default="true">1</guisoundmode>
<maintainoriginalvolume default="true">true</maintainoriginalvolume>
<passthrough default="true">false</passthrough>
<passthroughdevice default="true">PI:HDMI</passthroughdevice>
<processquality default="true">30</processquality>
<samplerate default="true">48000</samplerate>
<stereoupmix default="true">false</stereoupmix>
<streamsilence default="true">1</streamsilence>
<supportdtshdcpudecoding default="true">true</supportdtshdcpudecoding>
<truehdpassthrough default="true">false</truehdpassthrough>
</audiooutput>

Configuration from LibreELEC:
<audiocds>
<autoaction default="true">0</autoaction>
<ejectonrip default="true">true</ejectonrip>
<encoder default="true">audioencoder.xbmc.builtin.wav</encoder>
<recordingpath default="true"></recordingpath>
<trackpathformat default="true">%A/%A - %B/[%N. ][%A - ]%T</trackpathformat>
<usecddb default="true">true</usecddb>
</audiocds>
<audiooutput>
<ac3passthrough default="true">true</ac3passthrough>
<ac3transcode default="true">false</ac3transcode>
<audiodevice>ALSA:@:CARD=Pro,DEV=0</audiodevice>
<boostcenter default="true">0</boostcenter>
<channels>8</channels>
<config default="true">2</config>
<dspaddonsenabled default="true">false</dspaddonsenabled>
<dtshdpassthrough default="true">false</dtshdpassthrough>
<dtspassthrough default="true">false</dtspassthrough>
<eac3passthrough default="true">false</eac3passthrough>
<guisoundmode default="true">1</guisoundmode>
<maintainoriginalvolume default="true">true</maintainoriginalvolume>
<passthrough default="true">false</passthrough>
<passthroughdevice default="true">PI:HDMI</passthroughdevice>
<processquality>101</processquality>
<samplerate default="true">48000</samplerate>
<stereoupmix default="true">false</stereoupmix>
<streamsilence default="true">1</streamsilence>
<supportdtshdcpudecoding default="true">false</supportdtshdcpudecoding>
<truehdpassthrough default="true">false</truehdpassthrough>
</audiooutput>
<bluray>
<playerregion default="true">1</playerregion>
</bluray>
<cache>
<harddisk default="true">256</harddisk>
</cache>
<cacheaudio>
<dvdrom default="true">256</dvdrom>
<internet default="true">256</internet>
<lan default="true">256</lan>
</cacheaudio>

Found the problem! Under settings I have accidently turned Resample quality to GPU audio acceleration instead of High. Using High, medium or low now works with 5.1.