Hello.
I recently built a new LibreElec box and am having Audio passthrough problems on certain audio formats. DTSHD-MA and Dolby TrueHD are working, while Dolby Digital (AC3) and regular DTS are not functioning properly(no sound). Using the same files/receiver/cabling all audio formats passthrough fine on my previous LibreElec build(different computer and 8.2.x build).
Details of current setup:
- NUC8i5BEH1: Intel Core i5-8259U processor (2.3 GHz - 3.8 GHz, Quad Core, 6MB Cache, 28W TDP)
- Intel Iris Plus Graphics 655
- HDMI out from NUC to receiver (Pioneer VSX-1120) - capable of decoded all of these audio formats and still does on old Kodi machine
- LibreELEC release: Generic.x86_64-9.0.1
When I attempt to play a file encoded with DTS or Dolby Digital while on passthrough mode, I get no audio at all. My receiver seems to be getting an improper signal from Kodi while these files are playing, as it displays 'Dolby Pro-Logic' during playback. If I play back a DTS-HD or TrueHD file via passthrough, everything works perfectly. If I disable passthrough for specific format in question, Kodi will output PCM audio to receiver as expected.
- I have reset audio settings to default, rebooted. Same issue.
- I have changed audio passthrough device and changed back, rebooted. Same issue.
- Turned off specific passthrough formats and back on. Same issue.
- Log of issue: https://paste.ubuntu.com/p/4qshxh853v/
I play 3 files during debug capture:
1. Sopranos episode (Dolby Digital) - audio did not work
2. 21 Jump Street (DTS-HDMA) - audio did work
3. Movie '300' (DTS) - audio did not work
On a related note...... While playback is stopped, GUI sounds only function if 'Stereo Upmix' is turned on. When this is the case, my receiver is getting PCM sent to it. If I turn 'Stereo Upmix' off, my receiver again shows 'Dolby Pro-Logic'...... and no GUI sounds function.
Please let me know what other information I can provide to narrow down this issue.