(Audio) Add MIDI Out to ScummVM and px68k Bounty

[anothername99]

This is for both cores because very little code is likely necessary. You can use this Dosbox commit as a reference: libretro/dosbox-libretro@e6802ac

Bountysource link: https://www.bountysource.com/issues/60016014-bounty-add-midi-out-to-scummvm-and-px68k

[ToniBC]

Other emulators such as Dosbox Pure, Scummvm and some others use Fluidsynth for the Midi, that is, the code for that is already there and implementing it does not have to be complicated, with that it would solve the problems of the MIDI of this core. Obviously using Soundfonts.

[LibretroAdmin]

I believe MIDI support has been implemented for PX68K core now? Is it sufficient?

[ToniBC]

If it's already implemented, I'll test it to see. It's a simple solution, but the best would be to use the same as Scummvm or Dosbox, the Fluidsync directly in the core.

[ectorhga]

Oh, wow! I just stumbled over this here. MIDI support for this core sounds amazing! I'll try that, too. Any hints on how I have to set this up?
Do I need MUNT in the background and pass the MIDI signals through ALSA ports?

[MrBlastman]

This is not working flawlessly. In the current implementation it is not setting sound channels properly when GS devices such as the SC-55 are set to GS mode for games such as Akumajou Dracula--which require GS mode. They sound broken without passing this data to the device. I can confirm this is a problem because the XM6 emulator passes this information perfectly to the SC-55, whereas the libretro core does not, even when the options are set to "GS" mode inside the options menu. It is as if it is ignoring this completely--but there is a tremendous difference between GS and GM modes!

Edit:

I can also confirm this is broken for LA-Synth as well. My MT-32 will not set properly when the game launches, nor are instrument patches uploaded to the device on launch as well. It is as if the core is completely ignoring the LA/GM/GS/XG option settings.

In older emulators such as XM6, when these device types are selected then the emulator changes how it interfaces with the MIDI device. This is not happening in px68k.

I can record a video of the audio differences if necessary. I can assure you they are quite remarkable.

[riggles1]

This is not working flawlessly. In the current implementation it is not setting sound channels properly when GS devices such as

I can't get it to work either, it's all turning into pianos. That's what's happening on your end as well?

[biffrapper]

This is not working flawlessly. In the current implementation it is not setting sound channels properly when GS devices such as

I can't get it to work either, it's all turning into pianos. That's what's happening on your end as well?

Yep, that is exactly what is happening. It is not properly initing instruments/GS.

[Kelvfimer]

I confirm that the Midi support is a bit glitchy in all games.

Besides if you play Wolfteam games (i.e. Arcus Odissey or Sol-Feace) in midi mode (press 登 key when bootting that in the emu is mapped to scroll lock key) using MT-32 and SC-55 the games doesn't recognize SC-55.

On the other hand, I may say that using MT-32 munt, SC55 ZZdenis sf2 and a custom SC-55.cfg in timidity I had almost similar midi music as the original X68000 for Castlevania.

So pls can anybody implement proper Midi Support :) thx!!

[Kelvfimer]

BTW, I opened a feature request in MAME libretro for MIDI support, regular MAME has MIDI support but libretro one nope. It's good to have several options. The only thing needed is somebody with knowledge to make the MIDI Wrapper as the one done in PC68k libretro.

libretro/mame#477