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Demo of the 2nd Prototype

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

a MIDI interface for the OPL2 Audio Board and OPL3 Duo!

maarten-janssenMaarten Janssen 10/31/2021 at 17:460 Comments

During the last week I've fixed all the issues I had with the new prototype PCBs that I ordered. I still need to make some final adjustments and the I will order a new small batch that will hopefully be the final prototype. 

In the mean time I also recorded a small demo to show the second prototype and how I create a simple Jill of the Jungle inspired beat

Transmitting the internal clock over MIDI

It is now possible to transmit MIDI clock events when the internal clock is used to sync other devices. When enabled also start, stop and continue events will be sent. When I was testing the transmission of the MIDI clock I found an issue in the internal clock that I was sort of expecting. I had noticed that the internal clock seemed to start drifting over time and this was confirmed by the clock that I was sending. The fix was simple enough: just using a higher resolution timer fixed the problem.

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