So a while ago now while I was restoring a Candy Cab I posted about version 0.196 and occasionally 0.18- of GroovyMAME doing some odd sound dips on my Linux PC build. The PC was more than powerful enough to run everything up to NFL Blitz and I only had issues with certain games mainly Bubble Bobble and Street Fighter II. Everything was checked and there seemed to be no solution. I returned to GroovyMAME 0.165 where everything ran and still runs perfectly.
Recently I built a console box PC for my PVM, designed to run console stuff at native res which works great. However, a few days ago I thought I'd throw a few arcade roms on there just to see how they ran etc. I'm using a fairly powerful i5 DELL machine and noticed that exactly the same sound issue happens! Only this time it's just with SF2, SF2CE, Turbo and all of the Alpha/Zero games! It is only in the newer versions of Groovymame, having tried 0.196 and 0.197. When I run it using the FBAlpha core in Retroarch with CRTSwitchRes on everything is perfect. Oddly if I run the MAME 0.199 core with RA all perfect again. I've tried numerous things in the .ini like settings custom refresh rates and all sorts and there is no remedy to this. There is NO slowdown or frame lag, it's just the sound every now and again goes weird, distorted like speeding up and slowing down. Having owned the boards for Zero 2 and SF Turbo I have never noticed this on original hardware, nor does it do it on any of the Retroarch MAME or FBA cores - does anyone know what is going on here? It seems really peculiar.