LUMI

Mike Gao's 250b Wiki

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Developed with Craig Hanson, the LUMI is a 32 pressure sensitive LED button matrix combined with a touchscreen, 8 knobs, crossfader and infrared sensor. This project was developed in 250a, and continued in 250b. For 250b, a new chassis was constructed and knobs, infrared and crossfader was also added. Special thanks to Chris Weil for the help on mechanical engineering.

New software features include: - Auto chop - Chop to Step sequencer - Auto-assign chops to buttons

Features I am still working on over spring break: - KNN / MFCC based beatbox trigger of cops - groove features - auto chop by MIR

Difficulties faced/Lesson learned:

When utilizing an infrared sensor in a switching circuit, care must be taken in the power supply of the infrared, as there is a 20ms or so latency between when the infrared sensor is powered, and when it will give useful output. The way we got around this was using a transistor circuit, and permanently connecting the infrared's own power supply. The switching is then handled by the transistor rather than the sensor.