The Scottish Chamber Orchestra is a deeply impressive group, says Michael Tumelty, and could even rank as Scotland’s best classical ensemble. So why don’t you hear much about them? “Let’s be brutally frank: when was the last time you had to queue at the box office, far less round the block, to get a ticket for an SCO concert? Indeed, when was the last time you overheard or participated in one of those animated pub or street conversations where folk raved about the world-class orchestra that played weekly on their doorstep?”