Damir merci Damir; in my own situation,all my song audio has exactly the same timing ! at first version, i did "pre-mixed" backing tracks with drums and bass. But in second version, i did separate drums and bass on distinted tracks (with exactly same timing).. luckily id id not have 500 songs to recreate in audio regions , just a 2 hours set ! and yes, i know that i am not using audio regions as it was done for... but in my use, colored zone are very helpfull to follow a track, song notes written with same colors in a pdf