Is this an 'April Fool' joke or a real trial? :-) http://www.bbc.co.uk/taster/projects/radio-3-concert-sound/inside-story Jim -- Electronics https://www.st-andrews.ac.uk/~www_pa/Scots_Guide/intro/electron.htm Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html Audio Misc http://www.audiomisc.co.uk/index.html