90's arcade games with PCM sound

[Multijointed Monster Maker]

I notice there is a certain quality/feel to the music on arcade systems like the Neo Geo and the CPS2. Both Capcom and SNK seem to always used a similar sample library that I can recognize right off the bat as a mid 90s arcade game. You can hear the same very synthy trumpet sound in a lot of games. Video game composer Hiroyuki Iwatsuki from Natsume also uses this sample library a lot. I'm wondering if there is a name for this seamingly popular sample library, and what kind of synthesis was used to generate these sounds?