I don't suppose that there is a way to change resolution of BiA, is there?

The resolution is set in the Video card config. RIght click on the DeskTop and look for change settings.
Audio/sound is more of an issue.

Thanks. Unfortunately I can't get the res low enough to take proper screenshots.

Sorry it took so long. On DTop, right click properties tab9Usually at bottom of the menu) and you can select 256 colork which was the original MAX as I recal. I have disks from that time. You can also set other property factors. THe DOSBOX is supposed to scale DOWN the modern computer to run these old games. Some times the codex gets scrambled and/or a glitch in the adaptation of OLD to NEW codex requirements, and these may be different for each game and/or build. It appears that GOG has taken the HELP tab off of the website, and I can not find anyway to report bugs, of which there are several. SOMETIMES, deleting and re-install can overcome the glitch. Best to ya on that. It usually takes weeks to get solution, and then oNLY with email direct to GOG Webmaster et al, on the .com website. NONE in game. NOTE: saved games are sometimes in a different FOLDER, i.e. My Games, or similar, on the C:\ drive. I lost 800 hours of play time on ES Oblivion and 600 hrs on another gmae, and found the Saved Games in that folder, AFTER some symathetic person read a post, answered it with RIGHT action to take.