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BulkyMIDI-32 Extras
BulkyMIDI-32 is based on the mt32-pi project, bringing you the all the auditory excellence that was the Roland MT32. It's emulation, but it's an obtainable package that won't cost more than my current car. Widely considered to be the ultimate in retro MIDI-modules, it's the audio card every 90s PC gamer eventually found out was never actually an audio card and instead its own thing completely separate from your computer.
The BulkyMIDI-32 was my attempt at building something that would look nice on my desk while playing all of those classic Sierra games. After putting it together I took stock of all the features I had originally wanted on it, but I realized that I would need an additional board just to physically fit all of the connectors and larger components needed. And so - work on extras board was started with the aim of implementing the following features:
- Providing an option for mounting RS232-modules for level translation
- An Atmega328 MCU for performing baud rate translation of these signals when connecting a real Roland MT-32 to a PCs serial port. This is due to the MIDI standard using a baud rate that would be well outside of what the serial port can be configured to provide, at least without physically changing the crystal on the hardware.
- Passive two-channel audio mixer, allowing you to mix the sound effects coming from the sound card with that of the MIDI module without dealing with configuring a mixer in software on the card.
- Status LEDs
- Three extra MIDI ports that can individually be configured to serve as additional MIDI OUT or THRU ports.
- Able to mount a rotary encoder for use with the main module.
This is the extras module, check out the related shared projects for any additional modules - these include extra functionality in addition to the faceplates shown in the images. While the baud rate translation feature as well as the passive audio mixer can be used standalone, the extras board was designed for use with the main BulkyMIDI-32 module.
This is revision C of the board, it has the potentiometer and rotary encoder spaced a bit out to allow for slightly larger knobs. Additionally, the circuit for the activity LED was changed - instead of flickering on and off at a very high frequency, a 555 is used to light it up more consistently.
BulkyMIDI-32 Extras
*PCBWay community is a shared platform and we are not responsible for any design issues.
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C64iSTANBUL Apr 13,2022
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