[selmat]

For me, as was already mentioned, silence is the best one. This is why i prefer home-office. All other "solutions" induce headache to me.

In noisy environment can be helpful brown noise. I also tried focus@will (sample is here: https://www.youtube.com/watch?v=5OGJRx76zLY). From my experience 45-60 minutes is maximum.

If I need high focus and think about solution music is just another source of distraction for me. As background for tedious tasks it depends on my mood.