Iphone X and Bluetooth Bose speaker

I would try a Network Settings Reset (Settings>General>Reset>Reset Network Settings), keepin' in mind that this procedure also resets Wi-Fi networks and passwords, cellular settings, and VPN and APN settings that you've used before, but no other data is affected.

When done, restart your device and test it.

If you get no improvements, if your BT connection doesn't work with any of your accessories, then yes, it could be a BT glitch. Make an appointment and have your iPhone inspected at an Apple Store or Authorized SErvice Provider: Apple – Location Selector

Regards

Giulio

if i play without the speakers, there don't seem to be buffering issues...

To add a bit to ProustGiulio's comments, you verified that the wireless (Wi-Fi or cellular) connection between your new iPhone X and the Internet is not the culprit ... but the Bluetooth streaming between the phone and the speakers may be.

This wouldn’t do anything since the issue seem to be coming from the Bose since the hi pitched voice indicate an error in the sound treatment done by the Bose itself the solution could be as simple as an update of the bt Bose speaker using the official Bose app

cxprien,

the OP, in one of his previous posts, stated that s/he's having problems also using her/his BT headphones.

I agree with you, when you say that you would investigate if anything should be updated on Bose's side (in fact, if you take a better look, that was what I suggested in my 1st reply here). But, since there is an issue with the BT headphones too...

Giulio

Try to re-pair your BT speakers again, and/or contact Bose support team and ask them if your system needs a firmware update.

Regards

Giulio

Thé official BOSE app offers you to update your products I think it’s te way to go since the problem seems to come from your BOSE speaker not treating the data it receives properly

You're welcome. Please let us know how it goes :-)

Giulio

Glad it helped, tessa73 :-)

Giulio