I'm trying to replicate stereo sound across 2 bluetooth speakers instead of 1.I'm not sure that I understand what you. are trying to achieve. All the scenarios that I mentioned are producing stereo sound...There is a distinct left and right channel. How is that different to what you are attempting to achieve?To clarify - for normal use with 1 device, the lag isn't noticeable.On my boat; I use a fairly cheap little bluetooth adapter plugged into the aux in socket of my stereo system.
I use it for playing music and sound from films from Pis (either 5 or 400).
I've never noticed any lag on films. It works just fine. The only issue with this particular device is that I need to switch it on BEFORE enabling BT on the PI, otherwise it connects in CVSD node rather than SBC or SBC-XQ. None of my other BT devices don't seem to suffer this issue. It's a minor inconvenience; nothing more.
We also use several different BT headphones with the same PI's for both video and music...and again...no lag. I also have a BT "boom box" which is used in the cockpit...It can play quite load and would be very useful for playing bagpipe music to clear an anchorage.![:lol:]( "Laughing")
I rarely use that for video; but have done so once or twice; and experienced no issues.
If you do ever get sound lag when you are watching a video in VLC; You can actually adjust the sound offset.
The lag becomes noticeable when Stereo Pairing is engaged, that is, 2 bluetooth speakers are linked so each becomes a mono channel speaker, one left, one right. Many bluetooth speakers do this now, Sony, Creative, JBL, B&O, etc, and since (I believe) their underlying tech is the same, they all have the lag.
So my project is an attempt to 1. get the "Stereo Pairing" effect on bluetooth speakers that don't have that feature built-in and 2. get around that latency
Have you tried my second suggestion of adjusting the lag in VLC?
You can also get audio via USB by using an USB audio card...They are cheap as chips a on any of the usual online supermarkets. You can also get a similar "splitter" for HDMI that provides an audio output. Some HDMI screens also have audio outputs that you can use too. The one I'm using right now certainly does...Thought both those solutions are not wireless of course.
Similar to bluetooth speakers that already have stereo pairing built-in, but I'm trying to do it on 2 speakers that don't have that functionality built-in.
Like I said, in a way, I'm being dense, I could just get models that already have that feature, but I don't like those models.
I figured I could use this as an excuse to tinker a little bit with micro computers
Statistics: Posted by shadowoflight — Sat Sep 13, 2025 5:45 am