Install bluez-firmware

Install bluez-firmware.sh

# if you canno't install bluez-firmware
#
# Add the line below to ```/etc/apt/sources.list```
#
# deb http://ftp.de.debian.org/debian jessie main non-free

#sudo add-apt-repository ppa:snappy-dev/image
#sudo apt-get update
#sudo apt-get install bluez-firmware

sudo curl http://ftp.br.debian.org/debian/pool/non-free/b/bluez-firmware/bluez-firmware_1.2-3_all.deb > bluez-firmware.deb
sudo dpkg -i bluez-firmware.deb

apt-get install pulseaudio pulseaudio-module-bluetooth pavucontrol
service bluetooth restart
killall pulseaudio
apt-get install blueman

#edit /var/lib/gdm3/.config/pulse/client.conf
    autospawn = no
    daemon-binary = /bin/true

#add this to /etc/pulse/default.pa
    load-module module-switch-on-connect

#Add this to /var/lib/gdm3/.config/pulse/default.pa

    #!/usr/bin/pulseaudio -nF
    #

    # load system wide configuration
    .include /etc/pulse/default.pa

    ### unload driver modules for Bluetooth hardware
    .ifexists module-bluetooth-policy.so
      unload-module module-bluetooth-policy
    .endif

    .ifexists module-bluetooth-discover.so
      unload-module module-bluetooth-discover
    .endif

https://wiki.debian.org/BluetoothUser/a2dp