By setting the speed (under timing) to 61 or above in post 1.36 versions, you can finally eliminate this issue. Note that this workaround affects PAL games in which it causes them to play faster than normal, so it's best to use this fix with NTSC games.
Hi, maybe this info will help to solve this problem:
https://github.com/rdanbrook/nestopia/issues/46
https://github.com/rdanbrook/nestopia/issues/46#issuecomment-165468503https://github.com/rdanbrook/nestopia/commit/7c8d9d9c95dd24217f79c9eae24e3fcf4b0d485b
(sorry for posting code as image)
This bugfix should work. Many thanks to Marty.
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Official 1.40 compiled with native VS2005 and DXSDK-summer-2004
"vanilla" and "soundfix" version.
http://rghost.ru/8P9KL5rhg-----------------------------------------------------------------