News-Gazette (Dec. 3) -- Each week, staff writer Paul Wood chats with a high-tech entrepreneur. This week, meet recent University of Illinois graduate and Trala founder SAMUEL WALDER, whose app helps violin and viola players learn music faster and make fewer errors by tracking practice time and providing instant feedback. It took home the top $15,000 prize among startups on the non-university tech track at the 17th annual Cozad New Venture Competition.