Answer by Graham Campbell:
I would suggest you search for an unsolved problem or need in the electronics or software field. I suspect music is unlikely to fit in.
For example – software that allows musicians to jam together in real time and record it live. (Like Skype but better quality and aimed at Musos with features to add value).
To some extent, solving puzzles and software design are related skillsets, so I suggest use these as your core strengths (2 out of 4 listed) and reach into the music and electronics field with those skills (as above example).
Raspberry Pi devices also play into those strengths. Perhaps a ‘plug n play’ hydroponics controller with feedback modules for light / heat / soil.