It's fairly intuitive, although "sound font" does not apply here. Presuming you're playing a MIDI from SB-55 while in game with SC-55.
Basically, you're changing the instruments with whatever the MIDI file is using, and then the game isn't adapting. In some cases, it should, but since I don't know what the SB-55 MIDI or SC-55 game music is actually doing, there's too many variables at play to give you specific answers.

The recorded music (SB-55?) having different instruments is more complex and it depends what you mean, and when you're experiencing this.

Spikey wrote on 2024-09-04, 04:14:

It's fairly intuitive, although "sound font" does not apply here. Presuming you're playing a MIDI from SB-55 while in game with SC-55.
Basically, you're changing the instruments with whatever the MIDI file is using, and then the game isn't adapting. In some cases, it should, but since I don't know what the SB-55 MIDI or SC-55 game music is actually doing, there's too many variables at play to give you specific answers.

The recorded music (SB-55?) having different instruments is more complex and it depends what you mean, and when you're experiencing this.

I apologise I'll say it in the easiest way I can, when a midi song is recorded the playback sounds different even when at the command prompt the instruments are different and sometimes some of the instruments from the song are not there, I tried the midi songs on a windows 10 pc with media player and it sounds much better basically the same as the original song if I had to have a gripe about it it is I think the SB55 doesn't record the falloff, I think that's the term where the notes have no fade out like a keyboard with sustain so it seems like a cheesy copy please excuse my pun but it is still a good recording

I just want to confirm when you say record, you are meaning taking the line out of the audio device and recording to a digital audio file like WAV or MP3?

If I understand correctly, MIDI files that play correctly on SC-55 sound incorrect on SB-55 or other devices. My first guess would be that the MIDI files do not include a proper GM or GS Reset message. Every game is different, some send proper messages, but many don't. When no message is sent, SC-55 will use it's default settings. Since most games were made on SC-55, the default settings work. However, other modules have different default settings, and may not play correctly without a GM or GS Reset.

Long time ago, I downloaded Doom E1M1 MIDI
off of doom world. Was fine on my 55, but broken on my Yamaha MU2000 unless I switched it to GS mode. However, by editing the midi file and adding a GM Reset, it would then play properly in GM/XG mode.

I will have to make a recording of what it sounds like o show what i mean I think your right about there being no GM Reset I haven't looked up if Gabriel knight 1 was made for the SC55 I hope it becomes clearer when I show the recordings