Bluetooth Stutter

Hi I have some stutter with bluetooth but the advanced audio setting button is greyed out and only shows tuning. How do I reset the buffer and what should I set it to ?

thanks in advance

Simon, what version of iReal Pro do you have?
Check in the Play store and see if you can update iReal Pro (backup first to make sure your songs are safe before updating). We made some improvements in the audio engine a few updates ago.
Also check for interference, move your device and speaker nearer to each other or try another room.