[Scummvm-tracker] [ScummVM :: Bugs] #13889: ScummVM hangs/crashes on game start with real MT-32 over USB MIDI

[ScummVM :: Bugs]

#13889: ScummVM hangs/crashes on game start with real MT-32 over USB MIDI
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Reporter:  bleggett  |       Owner:  (none)
    Type:  defect    |      Status:  new
Priority:  normal    |   Component:  Audio: MT32
 Version:            |  Resolution:
Keywords:            |        Game:
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Description changed by bleggett:

Old description:

> I've built an MT-32 Pi (uses Munt internally, but presents as a normal
> MIDI device) https://github.com/dwhinham/mt32-pi - which I'm connecting
> to my PC via a Roland UM-ONE Mk 2 USB MIDI interface.
>
> This combo works perfectly for both Dosbox and Exult - they see it as an
> external real MT-32, and everything (from CM-32 sounds to Sysex) works
> just fine.
>
> However, ScummVM (daily build as of this issue creation date) crashes on
> startup if I tell it to use this device as a "real" MT-32. It will send
> MIDI to the device just fine as a generic GM MIDI device, but it will
> hang on every game if I try to use MT-32 mode specifically.
>

> I get no console errors - just a hang on engine load. Disabling MT-32
> and using GM stops the hang (but naturally produces incorrect sounds for
> MT-32 games).
>
> Again - only ScummVM has this problem, so I think this is an issue with
> ScummVM and external "real" MT-32s over USB specifically.

New description:

 I've built an MT-32 Pi (uses Munt internally, but presents as a normal
 MIDI device) https://github.com/dwhinham/mt32-pi - which I'm connecting to
 my PC via a Roland UM-ONE Mk 2 USB MIDI interface.

 This combo works perfectly for both Dosbox and Exult - they see it as an
 external real MT-32, and everything (from CM-32 sounds to Sysex) works
 just fine.

 However, ScummVM (daily build as of this issue creation date) crashes on
 startup if I tell it to use this device as a "real" MT-32. It will send
 MIDI to the device just fine as a generic GM MIDI device, but it will hang
 on every game if I try to use MT-32 mode specifically.


 I get no console errors - just a hang on engine load. Disabling MT-32 mode
 in ScummVM and seding normal GM to the device works and stops the hang
 (but naturally produces incorrect sounds for MT-32 games, as the device is
 being sent GM data).

 Again - only ScummVM has this problem, so I think this is an issue with
 ScummVM and external "real" MT-32s over USB specifically.

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Ticket URL: <https://bugs.scummvm.org/ticket/13889#comment:1>
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