it’s a square and a sonic trike
The hit that is sonic trike. Check design details, thanks to Nick Martin at Creative Solutions. minirig speakers in chopped and folded cutlery holders, subwoofer strapped into back basket, pi2, lithium battery, output alarm flashing away in neat grey box on bike stem, all quietly complementing this lightweight easy to maneouver instrument of bicrophonic delight. The visitors book confirmed this. Sadly its over all too fast and the show is wrapped by 18.00h. The good thing is, this could be the start of some serious bicrophonic hardware development. More trikes for all?