[BUG]: Feedback messages from Resolume Arena are somehow incompatible with either KSA or our older MIDI 1 driver.

When using MID1 drivers, the LEDs on the devices do not light up in response to feedback from Resolume Arena.

We've validated that the correct messages are being sent out (validated using internal and third-party loopbacks, and compared to what Arena says it is sending). It may be an issue that the messages are sent out too quickly, or there may be some other concern. It may also be device-by-device.

In addition, using the MIDI Settings app scratch pad, I was able to send the messages to light up the LEDs. However, if I tried it a second time, it would not work. I had to switch to the Notes port, and then send a message there, before I could send to the Control port again and see any lights. This investigation is on-going.

Example set of messages sent to the AKAI APC mini mk2 Control port

96 38 3F
96 39 1F
96 3A 5F
96 3B 2F
96 3C 6F

It does not appear that speed is a factor. Various duration wait statements were put in wdmaud2.drv for testing, and they had no impact.

Workaround

Workaround instructions for (in my example) the AKAI APC mini mk2 are on Discord under the #workarounds-and-instructions section.