Zero crossing is the point in a sine wave where there is no voltage registering. Most daws have this by pressing the z key which is what I believe {though do not hold me to this that you do in Audacity}. If you cut a wave at a zero crossing point you will not get any clicks or pops. I hope this helps.


My Tunes

Psalm 57:7 My heart, O God, is steadfast, my heart is steadfast; I will sing and make music.