Digital/Analogue

castle96

I understand why there is a time delay in 2 different appliances/same program, but why with two Google nest, different rooms, same wifi connection ??

debitcardmayhem

Are they the same specs?

castle96

mmm assume so. Bought same place same time

MattMattMattUK

It depends, are you telling Google Assistant to play on both at in a group (eg. Hey Google, play Radio on Whole Home), or are you starting on one, then the other separately? Google devices buffer, they will buffer slightly differing periods based on the capacity of the connection at the time the feed is connected to, they might be connecting to a different server in the group, which could be ahead or behind of the first server etc. 
Analogue - The fastest, no encoding, live to the point of a fraction of a second.
Digital - The second fastest, there is the encode time pre-transmission and the decoding in your device.
Internet Audio - The slowest, delays can easily be between 30-60 seconds, the data needs to be encoded the, the packets sent to the device, packet loss and connection instability accounted for, the packets converted into audio and then played through the device, accounting for any buffering the device might also do.

Rodders53

Google Home App will have a "Group Delay Correction" feature in the Settings.. Advanced area for each device
Just stand where you can hear them both and adjust (delay) the 'early one' to be in time with the later one.

Why...  probably each gets a stream from the web rather than sharing a common one?  You'd probably need to ask Google (or a specialist Google forum).

MattMattMattUK

Rodders53 said:

Google Home App will have a "Group Delay Correction" feature in the Settings.. Advanced area for each device
Just stand where you can hear them both and adjust (delay) the 'early one' to be in time with the later one.

Why...  probably each gets a stream from the web rather than sharing a common one?  You'd probably need to ask Google (or a specialist Google forum).

That feature will not solve this issue as I would imagine it is caused by starting the streams independently, I have a lot of Google devices in my home, if I start them as a group they are always in sync (on a technical level they then all share the same stream), if instart them individually they never are (each device is establishing an independent stream), but the difference in variable depending on the stream.

The adjustment is in milliseconds, it is designed so that one can adjust speakers for an off centre positioning, not for delays in multiple online streams.