[lubuntu] Lubuntu 16.04 wireless speaker issues

Hi all

I upgrade my "Acer Aspire One" I installed Lubuntu 16.04 after totally removing lubuntu 14.04
The issue is that in lubuntu 14.04 my wireless speaker were working 100%.
Now in this new 16.04 environment I can't make my wireless speaker working.
Following many thread that advise to modify this file for example /etc/bluetooth/audio.conf
but I only have these files

rw-r--r-- 1 root root 258 Dec 24 2012 proximity.conf
-rw-r--r-- 1 root root 120 Dec 24 2012 network.conf
-rw-r--r-- 1 root root 397 May 19 2014 input.conf
-rw-r--r-- 1 root root 3874 Sep 28 2015 main.conf

what application create this audio.conf file?

these are the output for these command
aoplnx@lxn1:~$ pactl list short modules | grep blue
8 module-bluetooth-policy
22 module-bluetooth-discover
23 module-bluez5-discover
aoplnx@lxn1:~$ lsusb
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 002: ID 064e:d251 Suyin Corp.
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 004: ID 093a:2510 Pixart Imaging, Inc. Optical Mouse
Bus 003 Device 002: ID 0a5c:21e8 Broadcom Corp. BCM20702A0 Bluetooth 4.0
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 007 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 006 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Please any help or hint will be appreciated

Regards

Antonio