All-In-One Prototype Assembly

A project log for OPL Studio - OPL2 / OPL3 MIDI Synthesizer

The ultimate dual OPL3 MIDI syntesizer with touch screen

maarten-janssenMaarten Janssen 02/06/2024 at 17:090 Comments

All-In-One Prototype

All the parts to assemble the fist new All-In-One prototype have arrived and I have now put together the first board!

The LCD connector was especially difficult and exciting cause of the teeny tiny pins and I wanted to be careful not to melt the plastic while soldering the part with hot air. There were a few bridges that I managed to fix with the soldering iron, some flux and carefully dabbing the excess solder with some desoldering braid. I'm happy with the result and it seems that at least there are no shorts.

Of course I did make some mistakes when I ordered the components... :)

I haven't yet tested the board. I need to make some software changes to accomodate the different pinouts on this board. This is what I'll do during the course of this week and hopefully the prototype works as expected!

MIDI Controller Update

While I was waiting for the new PCBs and components I continued working on the MIDI and OPL controllers in the software. The audio part has been completely reworked to allow for exciting new features such as pseudo 4-OP instrument patches, patch effects and MIDI control mapping. 

Right now the MIDI control mapping is finished, except for the UI. You can now map any incoming MIDI CC to a synthesizer control. For example map MIDI CC 54 to a software vibrato, software tremolo or patch parameter such as operator output level.

Next up will be to implement support for pseudo 4-OP patches...