Vognar wrote:I'm using a laptop, so it's not easy to add a sound card (maybe usb ...?).
Yes USB is how you do it. Specifically a USB ti MIDI adapter.
The difference between MT-32 and General MIDI is important to understand.
Back in the old days, if you wanted MT-32 music and sound you really had no choice but to buy a Roland MT-32. General MIDI changed all of that. It is a set standard for 128 instruments allowing anyone to make a General MIDI compatible MIDI device..
So as long as your MIDI device is General MIDI compatible, the music and sounds will sound somewhat correct. If the games is playing a drum, you will hear a drum. If the game is playing a guitar, you will a guitar.
BUT General MIDI didn't define HOW exactly a drum or a guitar sounds is meant to sound. And that's why every General MIDI device sounds somewhat different.
Now the Roland Sound Canvas was the de-facto General MIDI reference for most MS-DOS games. Specifically the SC-55 and this is the MIDI module I recommend buying. Yamaha is my second recommendation, many prefer the sound of the Yamaha over the one of Roland. And then there are heaps of other MIDI modules that you need to listen to and see which ones you like.
But for the majority a Roland or Yamaha General MIDI module is what will need to get to do the job.
For sound fonts there is a dedicated thread here somewhere. Sound fonts offer quality that offers something extra, beyond and different from these of old General MIDI devices. Some are 100MB and larger.