Hi,
I use LE on a Raspberry Pi2 that's connected to an LG Smart TV (couldn't dig out the exact model, but in case if it's necessary I can dig it up) and to an external hifi over the analog jack. I sometimes enjoy playing music over the hifi once the TV is on too and I noticed significant delays between the audio from the TV and the hifi. It doesn't always happen however it's a common case.
I have tried many TVs in the past and many jack devices and usually the HDMI audio seems to be delayed compared to the jack output.
I was expecting this to be a common issue however upon some googling I couldn't find anything related. The issue presents still I have been using OE and now with LE 9.2.6 too.
Any ideas?