This patch fixes sound problem on models with discrete ym2612 (most of models 1, and VA 2.3).
This patch upgrades GEMS sound engine to v2.8.
Database match: Earthworm Jim (USA)
Database: No-Intro: Genesis (v. 20180824-045026)
File/ROM SHA-1: A544211D1EBAB1F096F6E72A0D724F74F9DDBCE8
File/ROM CRC32: DF3ACF59