max7219 *and* MIDI not working.

I can read the MIDI clock and blink a light.

I can display values using a MAX7219 to drive 7 segment leds.

BUT, when I combine both, I lose the MIDI clock completely. It seems to not read serial data anymore. Does this make sense to anyone?

Not to me.

Commented a bunch out and now it works, so I need to explore more.. Thanks.