peops spu 1.10 by shalma

shalma has made great improvements to the original peops spu 1.9 when they were working on pcsx-reloaded. This was not integrated into the pcsx-reloaded source tree at the time for some reason:

The original download site at sourceforge disappeared but I've uploaded the code I had here:
https://github.com/weimzh/peopsspu110b

list of improvements:
https://github.com/weimzh/peopsspu110b/blob/master/readme_1_10.txt

original thread @ ngemu:
https://www.ngemu.com/threads/peops-dsound-1-09-repair.140191

Maybe these improvements could be integrated into pcsx-redux.