Here is a 4 bar loop consisting of two audio events (kicks)
The original tempo of the audio files is 123bpm.
If one adjusts project tempo, even by only 3 bpm (original file 123bpm - new tempo :120bpm) the audio file is skewed terribly at start and end of each audio event.
You really need to fix this.
-Open cubase (120bpm)
-put it on an audiotrack from the beginning of the timeline
-duplicate it so you have 4bars filled (2xthe audiofile)
-loop the 4 bars
-listen to how the audio gets messed up
Optional Additional step- increase bpm to 123 (audio loop plays fine)
Your transients are being mangled, probably due to the stretch algorithm defined for the clip.
Try a different algorithm. It’s probably defaulting to “Elastique -Time”.
Sometimes “Standard - Drums” gives better results on percussive material.
(You can change the algo in the audio pool or in the Cubase sample editor)