Hi Baluan:
I also find this problem very annoying.
What I sometimes do is assign 3 of favourite sounds to the R1/2/3 (with their own effects), and then switch between them, by using the R1/2/3 switches. It also means you can easily play the sounds simultaneiously when you want. Because they each have their own effect, you don't get that annoying sound when you change.
Hope this helps,
Zalmi
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