As of 2017 and the release of Signal 9, Montreal avant-prog group Miriodor were still carrying the flag they first hoisted over 30 years earlier as one of the first groups on the "rock" side of the Quebec-based musique actuelle equation. At their inception, Miriodor could also be viewed as North American practitioners of the Rock in Opposition (RIO) style pioneered by such European groups as Henry Cow, Etron Fou Leloublan, Débile Menthol -- instrumental prog rock with the requisite technical skill and virtuosity but none of the pomposity that dragged down better-known prog out...