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Midi glitches when playing notes and turning knobs at the same time #176

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hex-spell opened this issue Sep 24, 2023 · 1 comment · May be fixed by #178
Open

Midi glitches when playing notes and turning knobs at the same time #176

hex-spell opened this issue Sep 24, 2023 · 1 comment · May be fixed by #178

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@hex-spell
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hex-spell commented Sep 24, 2023 •
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Describe the bug
Using the genesis midi interface I found that I cannot play notes and turn knobs at the same time. My guess is that the knobs are sending too many cc messages and flooding the serial connection. This bug is more noticeable in poly mode.

To Reproduce
Steps to reproduce the behavior:

  1. use the genesis midi interface, with a serial to usb midi connection. (baud rate is 4800)
  2. connect a midi keyboard and play something
  3. turn the knobs while the notes are playing
  4. the notes should start glitching, like slowing down or not playing at all

Expected behavior
we should be able to do both things at the same time

Additional context
I made this issue so I can link it to my pull request with a fix
This was referenced Sep 24, 2023
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@2xAA
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2xAA commented Dec 23, 2023 •
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Thanks for the issue.
Just in case anyone else comes looking, MIDI's baud rate is 31250.

The serial connection baud rate for MDMI (Mega Drive MIDI Interface) is 4800, which is about 6.5 times less than the MIDI spec which is really where this issue lies.

MDMI offers many different connection options where this issue is essentially negated, namely using the USB port of an Everdrive Pro or X7, or the MegaWiFi Cartridge.

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@2xAA @hex-spell