Connecting to Bose QuietComfort 35 on Debian Jessie

1. Install necessary packages

sudo apt-get install bluetooth 
sudo apt-get install bluez-alsa  
sudo apt-get install blueman 

2. Create a file called audio.conf in /etc/bluetooth/ folder, with the following content

[General] 
Disable=Socket 
Disable=Headset 
Enable=Media,Source,Sink,Gateway 
AutoConnect=true 

load-module module-switch-on-connect

3. Edit main.conf file in /etc/bluetooth/ and change the line to the following

# Restricts all controllers to the specified transport. Default value   
# is "dual", i.e. both BR/EDR and LE enabled (when supported by the HW).   
# Possible values: "dual", "bredr", "le"

ControllerMode = bredr 

4. Add your user to the bluetooth group

sudo usermod -a -G bluetooth prabin

5. Replace prabin with your username

6. Enjoy your music !!