Thanks, few more questions.
How patching works its on 1 game basis, i there is some program which scan some directory and patch all recognize games within?
Do i understand that some old games which using Adlib for sound have FX too and other games have only music and pc speaker sounds (if game have them)?
It seems to be on a 1 game basis, there is no way to scan and patch multiple games in a directory at once as far as I can tell.
Dreamblaster or Pdewacht knows for sure about this.
Your understanding about Adlib for sound is correct. Some games like for example Wolfenstein 3D, Duke Nukem 2, Stunts, Monkey Island and Prince of Persia v1.3 can use the Adlib synth both for music and sound effects.
A few games go even so far as having digital SFX with Adlib sound that is slightly worse sound quality wise than a original soundblaster. This includes games like Pinball Dreams, Pinball Fantasies, Flashback and Another World to mention some.
Doom and Wacky Wheels are examples of games that support only music with Adlib and has PC speaker support for SFX.
My overall impression is that later MS-Dos games only support music with the Adlib card and not SFX.