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Soundfont files can be found at various places on the Internet.
Soundfont files help convert MIDI into sounds with suitable hardware or more likely these days software such as fluidsynth or LMMS (among many others; I'm mostly limited to what I can install on OpenBSD). Soundfont files are RIFF format, so EXIF tools may show header details.
$ doas pkg_add p5-Image-ExifTool
...
$ exiftool lilsness.sf2
ExifTool Version Number : 12.60
File Name : lilsness.sf2
Directory : .
File Size : 908 kB
File Modification Date/Time : 2023:06:24 11:49:59-07:00
File Access Date/Time : 2023:06:24 11:49:59-07:00
File Inode Change Date/Time : 2023:06:24 11:49:59-07:00
File Permissions : -rw-r--r--
File Type : RIFF
File Type Extension : riff
MIME Type : application/unknown
Title : Lil'Sness.sf2
Product : SynthFont Viena
Software : SynthFont Viena
Copyright : Lil'Sness Soundfont © Lil'Alien 2022
Date Created : 3/04/2022 11:13:26 AM
Engineer : Lil'Alien
Comment : Megalovania
Parsing the soundfont for what instruments it has and in what banks requires some time spent pouring over the soundfont specification and various "ah hah!" moments. This otherwise generally requires quite a lot of slow clicking around in some gooey (GUI) interface, which isn't very greppable, and is generally hard to save somewhere for reference. Therefore,
One tricky point is that after doing a MIDI bank select a program change is also necessary; otherwise, the new bank select will have no (immediate) effect.
...
[ control_change => 96, 0, 0, 1 ],
[ patch_change => 0, 0, 42 ], # otherwise control_change ignored
...
http://www.synthfont.com/sfspec24.pdf
https://metacpan.org/pod/File::Format::RIFF
https://metacpan.org/pod/MIDI::Event
However some of those sites are broken in w3m as Google wants you to "sign into the Internet" or some other such nonesense:
https://ethanwiner.com/ewsf2.html
https://musical-artifacts.com/
https://sites.google.com/site/soundfonts4u/
Smaller soundfonts for smaller systems: