File CONFIG-midi-mt32-gm of Package dosbox

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File CONFIG-midi-mt32-gm of Package dosbox (Revision 47c1e22d1860248bbb96c8824ce4da3b)

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This dosbox version supports the built-in emulation of the Roland MT-32 synthesizer,
which is used in games that support the MT-32 sound device.

For it to work, you need to configure dosbox.

1 If you already have the config ~/.dosbox/dosbox-0.74-3.conf, if necessary, make a backup and delete it.
Then. start dosbox from the console, then type exit.
You will have a clean config, which already contains a description of the midi options required
to enable and configure the mt32 device.

2 Minimum settings to enable mt32:
mpu401=intelligent
mididevice=default
midiconfig=128:0
#mt32.romdir=/home/your_username/.dosbox

Please note, unfortunately, you cannot write mt32.romdir=~/.dosbox in the mt32.romdir option,
so for now you only need to write the absolute path.
By default, roms are looked for in the directory with the game executable file.

3 Place the ROMs in the ~/.dosbox config directory and rename the two firmware files to the correct names.
CM32L_CONTROL.ROM 64kB SHA1 a439fbb390da38cada95a7cbb1d6ca199cd66ef8
CM32L_PCM.ROM      1MB SHA1 289cc298ad532b702461bfc738009d9ebe8025ea

This section of the vogons forum https://www.vogons.org/viewtopic.php?t=31362 has a link to download them.
Please note that ROMs must be named exactly the same, with the same case,
all letters are capitalized, otherwise they will not be found!

4 Please note that the GM and MT-32 audio devices use the same mpu401 midi interface and the same port
(default 128:0), and they are configured in the game the same, but they are not compatible with each other.
If you use the MT-32, on a game that only supports GM, and vice versa, then the sound will be there,
but it will not play correctly.
Therefore, when launching the game, you must know in advance which midi device (GM or MT-32) each game supports!
This can be found by running the sound setup, usually the setup.exe file.
Then there are 3 ways to enable mt32 as well as GM.

Therefore, there are 3 ways to enable mt32, considering GM.

4.1 MT-32 is enabled globally and always. The MT-32 will be turned on all the time for all games,
including those that support only GM, while GM cannot be turned on, even via fluidsynth.
To do this, uncomment the mt32.romdir configuration parameter without forgetting to specify your username.
mt32.romdir=/home/your_username/.dosbox

4.2 MT-32 is enabled locally for every game that supports MT-32.
MT-32 will only be enabled for games that support it, and other games can use GM via fluidsynth.
To do this, comment out the mt32.romdir configuration parameter if you uncommented it earlier.
#mt32.romdir=/home/your_username/.dosbox

For each game that supports MT-32, you need to create 2 symlinks for each ROM from ~/.dosbox
and place them in the directory with the executable file of this game.

4.3 MT-32 or GM is manually turned on every time before starting the game.
To install / uninstall MT-32, run "sudo zypper in mt32emu-qt" / "sudo zypper rm mt32emu-qt"
in the console and enter the root password.
To start MT-32, run "Munt: MT-32 Emulator" from KDE menu or run krunner (Alt+F2) and enter mt32emu-qt and Enter.
To configure mt32emu-qt, start and stop mt32emu-qt, copy two ROMs files
from ~/.dosbox to ~/.config/muntemu.org, start mt32emu-qt again, check all checkboxes in the options,
then select the "ROM Configuration..." and specify the path to the ~/.config/muntemu.org directory
2 ROMs should appear with marked checkboxes and click OK.

To install / uninstall fluidsynth from GM, run "sudo zypper in fluidsynth" / "sudo zypper rm fluidsynth"
in the console and enter the root password.
To start / stop fluidsynth from the GM, run "sudo systemctl start fluidsynth" / "sudo systemctl stop fluidsynth"
in the console and enter the root password.
To enable / disable fluidsynth immediately at boot time, run the command "sudo systemctl enable fluidsynth" /
"sudo systemctl disable fluidsynth" in the console and enter the root password.
Remember that fluidsynth with GM soundfont loaded (default) consumes 157 MB of RAM!
To check if midi ports are available, run "aplaymidi -l".

If you run mt32emu-qt and fluidsynth at the same time, they will end up on different ports "aplaymidi -l".
The device will be used, the port of which is specified in the value of the midiconfig option
(previously we specified 128:0).

It is recommended to use method 4.2, it allows you to automatically start games with correct midi devices
without any additional actions on your part, except for setting, specifying synlinks
and autorun fluidsynth, if the extra 157 MB of RAM is acceptable for you.

If you find it easier to manually start mt32emu-qt or fluidsynth in advance, and not configure anything,
then use method 4.3.

If you only have games with MT-32 support, and method 4.2 does not suit you,
and you do not want to manually launch mt32emu-qt each time, use method 4.1.

P.S. One note about alsa parameter period_size and possible extraneous clicks and jerks in the sound!
fluidsynth asks to set period_size (alsa config parameter) to 64, although it works fine at higher values.
However, if you do this, you will have problems with methods 4.1 and 4.2,
expressed in extraneous clicks and jerks in the sound.
Methods 4.1 and 4.2 require a period_size (alsa config parameter) of at least 128,
but method 4.3 works fine with period_size 64.
Even if you set period_size to 128, you will have these problems in native games,
for example in Dune Legacy, where even 128 is too small.
If you know how to do this, I recommend setting the period_size parameter to 256 (by default, 1024).

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File CONFIG-midi-mt32-gm of Package dosbox (Revision 47c1e22d1860248bbb96c8824ce4da3b)

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