At this stage I decided the best option was to have LED feedback from the distance sensors rather than the synth oscilator. This presented a problem however with the FastLED setup i was using continuing to block the analogue read and LFO LED output. I once again experimented with interrupts but this effected the smoothness of the MIDI output. Eventually, by re-building my code from scratch I was able to work out that the delays that are built into the ‘cylon’ pattern of the red LED strip in the video above were the problem. This lead my to restart the coding of this pattern. I was however at a point where the MIDI sonar and LFO LED’s were working as expected, as shown below.
*SIDE NOTE*- In the above video the phone mic being used to record seems to be picking up the ultrasonic frequencies being sent out by the distance sensors. This could be an interesting thing to play with in future, but is also concerning if being used in a performance among vocal/instrument mics.