Andy wrote:
I use Linux Ubuntu.

I have tried for months to get a Bluetooth dongle (tried 4 kinds)
to send sound to my Altec Landsing wireless headphones with no luck.

Is there any other way to accomplish my task?

Thanks.

I can promise you one thing.

If you "did it with a SmartPhone", it would "just work".

Even Windows 10 does not have a full implementation of
Bluetooth in it. I was unable to set up a Piconet between
two Win10 machines (for fun). I managed to squeeze two packets
through it, before it died.

Linux has a decent stack, and at some point, I was using
a certain debugging tool, but I forget all the details.
And the thing was, the BlueZ stack was there all right,
but there was mention they might remove the utilities thing
I was using, from package manager. And I haven't been back
since, to test anything.

(See "deprecated tool" in the table here, for more details.
Arch gives excellent technical articles, even if you're
on Ubuntu and need to translate what you see a bit...)

https://wiki.archlinux.org/index.php/bluetooth

When you spend $20 on a Bluetooth device,
you get $100 worth of aggravation.

Quite a good deal, don't you see ?
A 5x return on your money.
Not even the bank does that.

If you have a SmartPhone and test with that,
you'll feel positively heroic when it works.

Paul (who wants to track down the inventor of Bluetooth and... you know)