MotionFlow Audio Bug / delay

[Jaroslav91]

Hey guys

yesterday I spent quite much time investigating why my Dolby audio is 100 ms late to picture and finally discovered the cause.

Turns out Motion Flow off with HDR Scene selected adds 100ms delay to Dolby 5.1 (including Atmos, DD Plus, DD). Turning Motion Flow on brings the sound back in sync with no issues at all. However not all of us want to use motion Flow with movies.

Funny thing is, this happens only on external HDMI sources, both direct to TV plug or receiver passthrough. Which is extra weird, as one would expect the AV receiver to be independent of the TV in processing audio, but appearently the TV sends some sync info back to the receiver to shift audio 100 ms back. Even though my Lip Sync receiver setting is turned OFF.

The setup is

TV KD-55XE7077 latest v8.905 EU firmware, Slovak language selected
AV rec. TX-SR393
nVidia Shield and Xbox Series X

Tested with nVidia Shield and Xbox Series X both in direct to TV and through receiver configuration, both TV speakers and AV rec. speakers the same 100ms delay with MotionFlow off @ HDR Scene.

Temporarily I solved this by setting Motion Flow to Custom with minimal smoothness but still would appreciate Sony to fix this.

[Joe_Dohn]

Do you have Enhanced Signal format enabled for your HDR devices?

[Jaroslav91]

Yup, everywhere including TV, Receiver and the input devices. HDR color space and 10/12 bit color depth are displayed correctly.

Even though this TV is like 350 nits and the 10 bit is also like FCR and frankly still see some banding so the HDR is more like a marketing gimmick I guess

[Joe_Dohn]

That's a little weird 🤔

This seems like a bug to me, but since you're already on the latest software version, try resetting the TV to factory settings and see how that goes.

- JD

[Jaroslav91]

I'm leaning towards the bug hypothesis as well, hard reset did not help at all. Just spent 20 min sorting my channels again 😀

Realistically, what's the odds of a new FW being released for an older model like this? I reached to the support team already they said to have escalated the ticket. Highly doubt they'll fix a bug just for me though 😂

[Jaroslav91]

Just got the official (and final) reply from Sony support - claiming this is normal and within specification, and there is no issue with the TV at all. 

Additionally there is explicitly stated the e-mail is intended for recipient only, is confidential and unauthorised publishing of the content is against the law. Therefore I can't publish the e-mail contents here.

To sum it up, Sony claims 100 ms delay is within spec, refuses to help a customer and threatens to prosecute if their faulty product gets further negative publicity.

That's it, I'm not buying anything from Sony ever again.

[Joe_Dohn]

That's unfortunate.

Thanks a lot for taking the time to share your findings here!

- JD