Sorry if that was asked before.
I plan to buy DAC module which attaches via I2S interface to RPI2. The only thing that stopping me would be if it’s not possible to play sound simultaneously over HDMI and external DAC in the same time via kodi. I saw similar questions being asked, but no one explicitly said it is doable.
What I got so far searching around is:
- Kodi can enable onboard analogue and HDMI in the same time (but onboard DAC is so bad I’m investing in dedicated DAC module)
- Yes, I know there would be slight delay in those two audio streams, but it’s not relevant for my application
- It looks you can do something similar on Linux with USB DAC and HDMI ( https://discuss.mopidy.com/t/multi-room-audio-2-zones-by-simultaneous-hifiberry-and-hdmi-output/808 ), but it’s not clear if that would work with I2S
- There is a hack that enables to route audio via ALSA (I2S) and video (omxplayer HDMI) - http://forum.kodi.tv/showthread.php?tid=221118&pid=1958062#pid1958062, but it’s not kodi
So to try to answer the question to myself, it looks like the only way would be to buy the following addon board:
which would allow to solve my exact needs in “passthrough” mode. Am I right?