Low quality of sounds created using the sound component!

Hi everybody.
I’ve created a series of sound stimuli using the sound component and now the quality of sound is not satisfying! There is some kind of buzzing sound in it! I mean they’re not separated and clear.
I don’t know if it’s because of the sound component in psychopy or my laptop!
I’ve uploaded the file here.
I would appreciate it if you could help me in this.

Seq_auditory.psyexp (23.0 KB)