Iphone SE VBAN Recv +/- 10 ms sync

[iwl]

Hi Forum,

it seems the VBAN Receptor on my Iphone SE has another sync +/- 10ms on every start and so "echos" to my other receivers.
I have set a 260-270ms Monitor Delay to be in sync with my Box connected to VoiceMeeter Potato via Bluetooth.
Another Receiver is a old Galaxy S2 Android where I have to set around 100ms MonitorDelay but that seems to stay in Sync with my Box on every start, have connected some External active speaker via Jack to S2.
Is there some way to improve that?
I have set Medium Network Quality for every receiver, what is the influence of that, what are favors and drawbacks of less and more?

Is there some good App which show peaks from the mic in time scale where I can adjust 2 Receivers even better?

[Vincent Burel]

yes, you can have a more or less important jitter pending on
- Network Quality parameters (Optimal = minimal jitter... but can make more hearable VBAN error on Wifi)
- sample latency used by the device (usually less than 512 samples = 10 ms).

With Medium Network Quality, internal buffering jitter can be around 30ms i guess...