The sound "patch set" was reworked from a collection of individual instrument .PAT files to a unified .FFF/.DAT sound bank format, resembling SoundFont, which could be either ROM or RAM based.
The process of patching middleware sound 'drivers' was greatly simplified with PREPGAME utility, which could fix most known DOS games automatically either by correctly installing and configuring native InterWave drivers or replacing the binaries for some rare devices like Covox.