From: Jonathan Gray Subject: Re: New: munt - library and apps emulating Roland MT-32 synthesizers To: Thomas Frohwein Cc: ports@openbsd.org Date: Thu, 28 Aug 2025 23:13:39 +1000 On Wed, Aug 27, 2025 at 06:51:39AM -0400, Thomas Frohwein wrote: > On Wed, 27 Aug 2025 00:00:28 +1000 > Jonathan Gray wrote: > > > On Tue, Aug 26, 2025 at 09:16:36AM -0400, Thomas Frohwein wrote: > > > On Mon, 11 Aug 2025 10:54:25 -0400 > > > Thomas Frohwein wrote: > > > > > > > Hello ports@, > > > > > > > > This is a new port for munt which provides a library mt32emu that > > > > can emulate high-quality synthesizers like Roland MT-32, CM-32L, > > > > LAPC-I. This library can be enabled by dosbox-staging with the > > > > attached diff (it's actually enabled by default; had to disable > > > > it without the munt port) to use this emulated audio device. It's > > > > also picked up by games/exult, which is why I'm including a diff > > > > here. > > > > > > > > For audio to work, ROMs from the synthesizers are needed to > > > > produce the sounds. dosbox-staging has some detailed info about > > > > those [1] and how to enable MT-32 MIDI. The address for the > > > > device has been 330 when software asks for it. I tested this > > > > successfully with a few games in dosbox-staging (Tie Fighter, > > > > Realms of Arkania: Blade of Destiny, and Jagged Alliance). The > > > > instructions for Ultima VII via games/exult are here [2]. > > > > > > > > The port also includes (GUI) applications to work more with these > > > > emulated synthesizers for those with an interest in making MIDI > > > > music. > > > > > > > > I've checked several other games/emulators that cover that era of > > > > MIDI music to see if they pick up libmt32emu (dosbox, dosbox-x, > > > > scummvm, sdlpop, shockolate), but that's not the case. We might > > > > need to be on the lookout if anything else from that era picks it > > > > up. > > > > A more general way would be to use the sndio midi interface like > > fluidsynth does. Then you could use scummvm's support for sndio midi. > > Which is the same way you'd connect to a real MT-32. > > scummvm actually includes mt32emu from munt for MT-32 emulation. The > files are in scummvm under audio/softsynth/mt32/. The way to make use > of the MT-32/CM32L ROMs is described at [1] (it works by the way). > > munt would basically be the way to make this available to other ports > via a shared library. I'm not sure if fluidsynth or sndio midi would > know what to do with the MT-32 ROMs without the mt32emu layer. I meant something like the alsa midi support munt seems to have, but for sndio. Not a requirement but would be nice to have.