Sound glitch/crackling on playback

Hi, I am new to linux and a bit more familiar with ardour. I have installed ardour on my linux lite and on playback the sound cracks and glitches. Does anyone have a solution for this?

The usual first step is to increase the period size on the audio setup page when you start Ardour (assuming you are using Ardour direct ALSA connection and not jackd). 1024 frames per period/3 periods per buffer is usually a good starting point.