have you ever tried HRDShop...a used to be free (very expensive now) app for making HRDI probes and the like...? Sometimes you can find an old free version being shared...got mine back in Imagine3D days when it was still free and we were trying to do HDR vrenders in Imagine3D; and the shop was instrumental in any success any of us had.

 

Once in a while I look around,
I see a sound
and try to write it down
Sometimes they come out very soft
Tinkling light sound
The Sun comes up again