Hi,
I'm trying to display the VU or level meters from my DAW (Logic pro) to LED bar graph.
I tried the code on the below link (written by PieterP) on my Teensy LC and added Mackie control as a control surface in Logic pro. its working fine, I'm getting the LEDs flashing as expected but it seems to be only showing mono signal.
Is it possible to have it for left and right channel (stereo) for each track/channels-trip ?
https://tttapa.github.io/Control-Surface-doc/Doxygen/d9/df2/4_8VULEDs_8ino-example.html
In theory, yes, but just not with the Mackie Control Universal protocol. In MCU mode, the DAW only sends a single level over MIDI. If you want stereo, you'll have to use a different protocol where your DAW sends both levels to the Arduino.
On the Arduino side, you can just duplicate your mono code to get support for stereo. The hard part here is getting the DAW to send the stereo data you need.
Perhaps you can find a different commercial control surface that is supported by Logic Pro and that displays stereo meters. Otherwise, you'll probably have to write some kind of control surface plug-in. The Logic Pro documentation mentions this: Logic Pro 9 Control Surfaces Support
But knowing Apple, I doubt it's an open format, it's probably something they only give to the control surface manufacturers they partner with.
Thanks @PieterP for the clarification, i will try different commercial control surface and check; otherwise, i will just use mono.