Choppy sound / lag MediaPlayer on mobile

Tags: #<Tag:0x00007f7033e3f170> #<Tag:0x00007f7033e3f0a8>

Hey everyone,
I created a simple drum machine here:

It works pretty well on desktop but is very laggy, choppy, very low fps on mobile (iOS iphone 12).
I suspect something in the MediaPlayer node.
I tried to switch to AudioBuffer but it was worse on Desktop as well.
I feel like I’m missing something.

Thanks for your help!