Thanks for the feedback!
Added alternative controls for laptops: "alt+left-click" can be used for navigation. "Space" for mute and "pinch gesture" for zoom.
Sounding was fixed by changing the sample rate to 40k. But sounds still can be very bad if change tune to some random value. I will check out envelope modes because I don't even know what that is ;)
Check out new controls. I will finish recording mode soon and try to make it laptop-friendly too.