...conduct a trial v (hold court proceedings) 进行审判，开庭审理 cost a pretty penny 花费很多，价格不菲 couldn't-give-a-damn attitude n slang, potentially offensive (apathy, lack of concern) 俚语，可能无礼 一点都不...
While confident that the setup wouldn't induce wild fits of feedback, Schwartz's invention would presumably costaprettypenny, and would likely only make a difference to those professional karaoke singers out there anyway.