Please check new kernel and dtb file on the VIM1 (s905X) in the mode of audio output to HDMI. You need to download two files (zImage and dtb.img) and replace them on the SD media. After downloading with the new files you need to enter the settings and select the device HDMI\toslink. I have VIM1 it has fixed audio output on HDMI. In the near future I will release a new release of Volumio with support for audio output via HDMI to VIM1 and VIM2.
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